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Finding the Fourth Proportional to 672.60, 928.28 and 410.76

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Solution

The fourth proportional to 672.60, 928.28 and 410.76 is: 566.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    672.60 : 928.28 = 410.76 : x
  2. Step 2: Convert to fraction form
    672.60/928.28 = 410.76/x
  3. Step 3: Cross multiply
    672.60x = 928.28 × 410.76
  4. Step 4: Simplify right side
    672.60x = 381,300.29
  5. Step 5: Solve for x
    x = 381,300.29/672.60
  6. Step 6: Final answer
    x = 566.90

Related Problems

Find fourth proportional to 336.30, 464.14 and 205.38
Half scale
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Double scale
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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.