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Finding the Fourth Proportional to 781.88, 1,079.00 and 432.57

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Solution

The fourth proportional to 781.88, 1,079.00 and 432.57 is: 596.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    781.88 : 1,079.00 = 432.57 : x
  2. Step 2: Convert to fraction form
    781.88/1,079.00 = 432.57/x
  3. Step 3: Cross multiply
    781.88x = 1,079.00 × 432.57
  4. Step 4: Simplify right side
    781.88x = 466,740.87
  5. Step 5: Solve for x
    x = 466,740.87/781.88
  6. Step 6: Final answer
    x = 596.95

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1.5x scale

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.