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Finding the Fourth Proportional to 390,301.68, 538,609.32 and 220,532.16

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Solution

The fourth proportional to 390,301.68, 538,609.32 and 220,532.16 is: 304,330.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,301.68 : 538,609.32 = 220,532.16 : x
  2. Step 2: Convert to fraction form
    390,301.68/538,609.32 = 220,532.16/x
  3. Step 3: Cross multiply
    390,301.68x = 538,609.32 × 220,532.16
  4. Step 4: Simplify right side
    390,301.68x = 118,780,676,735.73
  5. Step 5: Solve for x
    x = 118,780,676,735.73/390,301.68
  6. Step 6: Final answer
    x = 304,330.43

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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.