Home / 398,916.80-552,834.08-391,347.04

Finding the Fourth Proportional to 398,916.80, 552,834.08 and 391,347.04

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Solution

The fourth proportional to 398,916.80, 552,834.08 and 391,347.04 is: 542,343.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,916.80 : 552,834.08 = 391,347.04 : x
  2. Step 2: Convert to fraction form
    398,916.80/552,834.08 = 391,347.04/x
  3. Step 3: Cross multiply
    398,916.80x = 552,834.08 × 391,347.04
  4. Step 4: Simplify right side
    398,916.80x = 216,349,980,819.12
  5. Step 5: Solve for x
    x = 216,349,980,819.12/398,916.80
  6. Step 6: Final answer
    x = 542,343.62

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.