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Finding the Fourth Proportional to 687,475.87, 948,702.42 and 381,534.46

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Solution

The fourth proportional to 687,475.87, 948,702.42 and 381,534.46 is: 526,509.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,475.87 : 948,702.42 = 381,534.46 : x
  2. Step 2: Convert to fraction form
    687,475.87/948,702.42 = 381,534.46/x
  3. Step 3: Cross multiply
    687,475.87x = 948,702.42 × 381,534.46
  4. Step 4: Simplify right side
    687,475.87x = 361,962,665,515.39
  5. Step 5: Solve for x
    x = 361,962,665,515.39/687,475.87
  6. Step 6: Final answer
    x = 526,509.63

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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.