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Finding the Fourth Proportional to 675.42, 932.18 and 380.76

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Solution

The fourth proportional to 675.42, 932.18 and 380.76 is: 525.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    675.42 : 932.18 = 380.76 : x
  2. Step 2: Convert to fraction form
    675.42/932.18 = 380.76/x
  3. Step 3: Cross multiply
    675.42x = 932.18 × 380.76
  4. Step 4: Simplify right side
    675.42x = 354,934.95
  5. Step 5: Solve for x
    x = 354,934.95/675.42
  6. Step 6: Final answer
    x = 525.50

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Half scale
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Double scale
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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.