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Finding the Fourth Proportional to 423,294.72, 584,172.96 and 279,805.92

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Solution

The fourth proportional to 423,294.72, 584,172.96 and 279,805.92 is: 386,149.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,294.72 : 584,172.96 = 279,805.92 : x
  2. Step 2: Convert to fraction form
    423,294.72/584,172.96 = 279,805.92/x
  3. Step 3: Cross multiply
    423,294.72x = 584,172.96 × 279,805.92
  4. Step 4: Simplify right side
    423,294.72x = 163,455,052,511.92
  5. Step 5: Solve for x
    x = 163,455,052,511.92/423,294.72
  6. Step 6: Final answer
    x = 386,149.52

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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.