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Finding the Fourth Proportional to 618,269.91, 853,221.35 and 360,140.25

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Solution

The fourth proportional to 618,269.91, 853,221.35 and 360,140.25 is: 496,998.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    618,269.91 : 853,221.35 = 360,140.25 : x
  2. Step 2: Convert to fraction form
    618,269.91/853,221.35 = 360,140.25/x
  3. Step 3: Cross multiply
    618,269.91x = 853,221.35 × 360,140.25
  4. Step 4: Simplify right side
    618,269.91x = 307,279,348,493.64
  5. Step 5: Solve for x
    x = 307,279,348,493.64/618,269.91
  6. Step 6: Final answer
    x = 496,998.71

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Similar ratio
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1.5x scale

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.