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Finding the Fourth Proportional to 432,916.80, 649,439.70 and 133,372.32

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Solution

The fourth proportional to 432,916.80, 649,439.70 and 133,372.32 is: 200,078.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    432,916.80 : 649,439.70 = 133,372.32 : x
  2. Step 2: Convert to fraction form
    432,916.80/649,439.70 = 133,372.32/x
  3. Step 3: Cross multiply
    432,916.80x = 649,439.70 × 133,372.32
  4. Step 4: Simplify right side
    432,916.80x = 86,617,279,489.10
  5. Step 5: Solve for x
    x = 86,617,279,489.10/432,916.80
  6. Step 6: Final answer
    x = 200,078.35

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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.