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Finding the Fourth Proportional to 531,011.56, 732,515.30 and 315,998.44

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Solution

The fourth proportional to 531,011.56, 732,515.30 and 315,998.44 is: 435,910.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    531,011.56 : 732,515.30 = 315,998.44 : x
  2. Step 2: Convert to fraction form
    531,011.56/732,515.30 = 315,998.44/x
  3. Step 3: Cross multiply
    531,011.56x = 732,515.30 × 315,998.44
  4. Step 4: Simplify right side
    531,011.56x = 231,473,692,076.13
  5. Step 5: Solve for x
    x = 231,473,692,076.13/531,011.56
  6. Step 6: Final answer
    x = 435,910.83

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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 (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.