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Finding the Fourth Proportional to 458,473.40, 687,710.10 and 192,145.40

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Solution

The fourth proportional to 458,473.40, 687,710.10 and 192,145.40 is: 288,218.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    458,473.40 : 687,710.10 = 192,145.40 : x
  2. Step 2: Convert to fraction form
    458,473.40/687,710.10 = 192,145.40/x
  3. Step 3: Cross multiply
    458,473.40x = 687,710.10 × 192,145.40
  4. Step 4: Simplify right side
    458,473.40x = 132,140,332,248.54
  5. Step 5: Solve for x
    x = 132,140,332,248.54/458,473.40
  6. Step 6: Final answer
    x = 288,218.10

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.