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Finding the Fourth Proportional to 390,861.12, 539,244.72 and 237,837.12

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Solution

The fourth proportional to 390,861.12, 539,244.72 and 237,837.12 is: 328,127.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,861.12 : 539,244.72 = 237,837.12 : x
  2. Step 2: Convert to fraction form
    390,861.12/539,244.72 = 237,837.12/x
  3. Step 3: Cross multiply
    390,861.12x = 539,244.72 × 237,837.12
  4. Step 4: Simplify right side
    390,861.12x = 128,252,411,180.01
  5. Step 5: Solve for x
    x = 128,252,411,180.01/390,861.12
  6. Step 6: Final answer
    x = 328,127.83

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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.