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Finding the Fourth Proportional to 648,215.60, 972,323.40 and 435,639.20

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Solution

The fourth proportional to 648,215.60, 972,323.40 and 435,639.20 is: 653,458.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    648,215.60 : 972,323.40 = 435,639.20 : x
  2. Step 2: Convert to fraction form
    648,215.60/972,323.40 = 435,639.20/x
  3. Step 3: Cross multiply
    648,215.60x = 972,323.40 × 435,639.20
  4. Step 4: Simplify right side
    648,215.60x = 423,582,188,117.28
  5. Step 5: Solve for x
    x = 423,582,188,117.28/648,215.60
  6. Step 6: Final answer
    x = 653,458.80

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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.