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Finding the Fourth Proportional to 672.76, 927.72 and 463.12

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Solution

The fourth proportional to 672.76, 927.72 and 463.12 is: 638.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    672.76 : 927.72 = 463.12 : x
  2. Step 2: Convert to fraction form
    672.76/927.72 = 463.12/x
  3. Step 3: Cross multiply
    672.76x = 927.72 × 463.12
  4. Step 4: Simplify right side
    672.76x = 429,645.69
  5. Step 5: Solve for x
    x = 429,645.69/672.76
  6. Step 6: Final answer
    x = 638.63

Related Problems

Find fourth proportional to 336.38, 463.86 and 231.56
Half scale
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Double scale
Find fourth proportional to 673.76, 929.10 and 464.12
Similar ratio
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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.