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Finding the Fourth Proportional to 485,863.68, 670,463 and 281,898.80

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Solution

The fourth proportional to 485,863.68, 670,463 and 281,898.80 is: 389,003.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,863.68 : 670,463 = 281,898.80 : x
  2. Step 2: Convert to fraction form
    485,863.68/670,463 = 281,898.80/x
  3. Step 3: Cross multiply
    485,863.68x = 670,463 × 281,898.80
  4. Step 4: Simplify right side
    485,863.68x = 189,002,715,144.40
  5. Step 5: Solve for x
    x = 189,002,715,144.40/485,863.68
  6. Step 6: Final answer
    x = 389,003.59

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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.