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Finding the Fourth Proportional to 704,800.92, 972,624.87 and 398,871.75

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Solution

The fourth proportional to 704,800.92, 972,624.87 and 398,871.75 is: 550,442.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    704,800.92 : 972,624.87 = 398,871.75 : x
  2. Step 2: Convert to fraction form
    704,800.92/972,624.87 = 398,871.75/x
  3. Step 3: Cross multiply
    704,800.92x = 972,624.87 × 398,871.75
  4. Step 4: Simplify right side
    704,800.92x = 387,952,583,990.42
  5. Step 5: Solve for x
    x = 387,952,583,990.42/704,800.92
  6. Step 6: Final answer
    x = 550,442.79

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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.