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Finding the Fourth Proportional to 523,073.12, 721,995 and 308,282.72

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Solution

The fourth proportional to 523,073.12, 721,995 and 308,282.72 is: 425,520.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    523,073.12 : 721,995 = 308,282.72 : x
  2. Step 2: Convert to fraction form
    523,073.12/721,995 = 308,282.72/x
  3. Step 3: Cross multiply
    523,073.12x = 721,995 × 308,282.72
  4. Step 4: Simplify right side
    523,073.12x = 222,578,582,426.40
  5. Step 5: Solve for x
    x = 222,578,582,426.40/523,073.12
  6. Step 6: Final answer
    x = 425,520.97

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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.