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Finding the Fourth Proportional to 618,499.62, 853,515 and 363,867.18

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Solution

The fourth proportional to 618,499.62, 853,515 and 363,867.18 is: 502,128.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    618,499.62 : 853,515 = 363,867.18 : x
  2. Step 2: Convert to fraction form
    618,499.62/853,515 = 363,867.18/x
  3. Step 3: Cross multiply
    618,499.62x = 853,515 × 363,867.18
  4. Step 4: Simplify right side
    618,499.62x = 310,566,096,137.70
  5. Step 5: Solve for x
    x = 310,566,096,137.70/618,499.62
  6. Step 6: Final answer
    x = 502,128.19

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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.