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Finding the Fourth Proportional to 678,312.71, 936,082.52 and 372,417.29

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Solution

The fourth proportional to 678,312.71, 936,082.52 and 372,417.29 is: 513,941.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,312.71 : 936,082.52 = 372,417.29 : x
  2. Step 2: Convert to fraction form
    678,312.71/936,082.52 = 372,417.29/x
  3. Step 3: Cross multiply
    678,312.71x = 936,082.52 × 372,417.29
  4. Step 4: Simplify right side
    678,312.71x = 348,613,315,314.77
  5. Step 5: Solve for x
    x = 348,613,315,314.77/678,312.71
  6. Step 6: Final answer
    x = 513,941.89

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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.