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Finding the Fourth Proportional to 616.76, 850.98 and 383.72

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Solution

The fourth proportional to 616.76, 850.98 and 383.72 is: 529.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    616.76 : 850.98 = 383.72 : x
  2. Step 2: Convert to fraction form
    616.76/850.98 = 383.72/x
  3. Step 3: Cross multiply
    616.76x = 850.98 × 383.72
  4. Step 4: Simplify right side
    616.76x = 326,538.05
  5. Step 5: Solve for x
    x = 326,538.05/616.76
  6. Step 6: Final answer
    x = 529.44

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Find fourth proportional to 308.38, 425.49 and 191.86
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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.