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Finding the Fourth Proportional to 618,502.12, 853,518.45 and 363,869.68

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Solution

The fourth proportional to 618,502.12, 853,518.45 and 363,869.68 is: 502,131.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    618,502.12 : 853,518.45 = 363,869.68 : x
  2. Step 2: Convert to fraction form
    618,502.12/853,518.45 = 363,869.68/x
  3. Step 3: Cross multiply
    618,502.12x = 853,518.45 × 363,869.68
  4. Step 4: Simplify right side
    618,502.12x = 310,569,485,275.60
  5. Step 5: Solve for x
    x = 310,569,485,275.60/618,502.12
  6. Step 6: Final answer
    x = 502,131.64

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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.