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Finding the Fourth Proportional to 506,891.90, 699,432.90 and 291,990

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Solution

The fourth proportional to 506,891.90, 699,432.90 and 291,990 is: 402,901.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    506,891.90 : 699,432.90 = 291,990 : x
  2. Step 2: Convert to fraction form
    506,891.90/699,432.90 = 291,990/x
  3. Step 3: Cross multiply
    506,891.90x = 699,432.90 × 291,990
  4. Step 4: Simplify right side
    506,891.90x = 204,227,412,471
  5. Step 5: Solve for x
    x = 204,227,412,471/506,891.90
  6. Step 6: Final answer
    x = 402,901.31

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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.