Home / 398,916.11-552,833.19-391,346.39

Finding the Fourth Proportional to 398,916.11, 552,833.19 and 391,346.39

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Solution

The fourth proportional to 398,916.11, 552,833.19 and 391,346.39 is: 542,342.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,916.11 : 552,833.19 = 391,346.39 : x
  2. Step 2: Convert to fraction form
    398,916.11/552,833.19 = 391,346.39/x
  3. Step 3: Cross multiply
    398,916.11x = 552,833.19 × 391,346.39
  4. Step 4: Simplify right side
    398,916.11x = 216,349,273,178.68
  5. Step 5: Solve for x
    x = 216,349,273,178.68/398,916.11
  6. Step 6: Final answer
    x = 542,342.78

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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.