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Finding the Fourth Proportional to 708,766.80, 978,062.22 and 386,474.28

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Solution

The fourth proportional to 708,766.80, 978,062.22 and 386,474.28 is: 533,314.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    708,766.80 : 978,062.22 = 386,474.28 : x
  2. Step 2: Convert to fraction form
    708,766.80/978,062.22 = 386,474.28/x
  3. Step 3: Cross multiply
    708,766.80x = 978,062.22 × 386,474.28
  4. Step 4: Simplify right side
    708,766.80x = 377,995,892,269.70
  5. Step 5: Solve for x
    x = 377,995,892,269.70/708,766.80
  6. Step 6: Final answer
    x = 533,314.90

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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.