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Finding the Fourth Proportional to 639,074.61, 958,372.69 and 274,290.16

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Solution

The fourth proportional to 639,074.61, 958,372.69 and 274,290.16 is: 411,332.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,074.61 : 958,372.69 = 274,290.16 : x
  2. Step 2: Convert to fraction form
    639,074.61/958,372.69 = 274,290.16/x
  3. Step 3: Cross multiply
    639,074.61x = 958,372.69 × 274,290.16
  4. Step 4: Simplify right side
    639,074.61x = 262,872,198,479.73
  5. Step 5: Solve for x
    x = 262,872,198,479.73/639,074.61
  6. Step 6: Final answer
    x = 411,332.56

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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.