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Finding the Fourth Proportional to 704,979.45, 972,856.17 and 399,049.74

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Solution

The fourth proportional to 704,979.45, 972,856.17 and 399,049.74 is: 550,679.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    704,979.45 : 972,856.17 = 399,049.74 : x
  2. Step 2: Convert to fraction form
    704,979.45/972,856.17 = 399,049.74/x
  3. Step 3: Cross multiply
    704,979.45x = 972,856.17 × 399,049.74
  4. Step 4: Simplify right side
    704,979.45x = 388,218,001,695.90
  5. Step 5: Solve for x
    x = 388,218,001,695.90/704,979.45
  6. Step 6: Final answer
    x = 550,679.88

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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.