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Finding the Fourth Proportional to 586,320.39, 809,121.96 and 318,048.39

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Solution

The fourth proportional to 586,320.39, 809,121.96 and 318,048.39 is: 438,906.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    586,320.39 : 809,121.96 = 318,048.39 : x
  2. Step 2: Convert to fraction form
    586,320.39/809,121.96 = 318,048.39/x
  3. Step 3: Cross multiply
    586,320.39x = 809,121.96 × 318,048.39
  4. Step 4: Simplify right side
    586,320.39x = 257,339,936,691.64
  5. Step 5: Solve for x
    x = 257,339,936,691.64/586,320.39
  6. Step 6: Final answer
    x = 438,906.68

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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.