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Finding the Fourth Proportional to 618,445.66, 853,716.28 and 403,769.74

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Solution

The fourth proportional to 618,445.66, 853,716.28 and 403,769.74 is: 557,372.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    618,445.66 : 853,716.28 = 403,769.74 : x
  2. Step 2: Convert to fraction form
    618,445.66/853,716.28 = 403,769.74/x
  3. Step 3: Cross multiply
    618,445.66x = 853,716.28 × 403,769.74
  4. Step 4: Simplify right side
    618,445.66x = 344,704,800,409.37
  5. Step 5: Solve for x
    x = 344,704,800,409.37/618,445.66
  6. Step 6: Final answer
    x = 557,372.82

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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.