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Finding the Fourth Proportional to 485,660.61, 670,035.85 and 281,599.13

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Solution

The fourth proportional to 485,660.61, 670,035.85 and 281,599.13 is: 388,504.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,660.61 : 670,035.85 = 281,599.13 : x
  2. Step 2: Convert to fraction form
    485,660.61/670,035.85 = 281,599.13/x
  3. Step 3: Cross multiply
    485,660.61x = 670,035.85 × 281,599.13
  4. Step 4: Simplify right side
    485,660.61x = 188,681,513,399.90
  5. Step 5: Solve for x
    x = 188,681,513,399.90/485,660.61
  6. Step 6: Final answer
    x = 388,504.87

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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.