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Finding the Fourth Proportional to 641,342,991.60, 962,014,487.40 and 549,509,986.80

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Solution

The fourth proportional to 641,342,991.60, 962,014,487.40 and 549,509,986.80 is: 824,264,980.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,342,991.60 : 962,014,487.40 = 549,509,986.80 : x
  2. Step 2: Convert to fraction form
    641,342,991.60/962,014,487.40 = 549,509,986.80/x
  3. Step 3: Cross multiply
    641,342,991.60x = 962,014,487.40 × 549,509,986.80
  4. Step 4: Simplify right side
    641,342,991.60x = 528,636,568,272,582,720
  5. Step 5: Solve for x
    x = 528,636,568,272,582,720/641,342,991.60
  6. Step 6: Final answer
    x = 824,264,980.20

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.