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Finding the Fourth Proportional to 661,987.60, 991,960.80 and 492,713.80

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Solution

The fourth proportional to 661,987.60, 991,960.80 and 492,713.80 is: 738,311.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,987.60 : 991,960.80 = 492,713.80 : x
  2. Step 2: Convert to fraction form
    661,987.60/991,960.80 = 492,713.80/x
  3. Step 3: Cross multiply
    661,987.60x = 991,960.80 × 492,713.80
  4. Step 4: Simplify right side
    661,987.60x = 488,752,775,219.04
  5. Step 5: Solve for x
    x = 488,752,775,219.04/661,987.60
  6. Step 6: Final answer
    x = 738,311.07

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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.