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Finding the Fourth Proportional to 618,508.64, 853,356.15 and 400,371.80

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Solution

The fourth proportional to 618,508.64, 853,356.15 and 400,371.80 is: 552,392.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    618,508.64 : 853,356.15 = 400,371.80 : x
  2. Step 2: Convert to fraction form
    618,508.64/853,356.15 = 400,371.80/x
  3. Step 3: Cross multiply
    618,508.64x = 853,356.15 × 400,371.80
  4. Step 4: Simplify right side
    618,508.64x = 341,659,733,549.79
  5. Step 5: Solve for x
    x = 341,659,733,549.79/618,508.64
  6. Step 6: Final answer
    x = 552,392.83

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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.