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Finding the Fourth Proportional to 672.76, 928.76 and 452.87

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Solution

The fourth proportional to 672.76, 928.76 and 452.87 is: 625.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    672.76 : 928.76 = 452.87 : x
  2. Step 2: Convert to fraction form
    672.76/928.76 = 452.87/x
  3. Step 3: Cross multiply
    672.76x = 928.76 × 452.87
  4. Step 4: Simplify right side
    672.76x = 420,607.54
  5. Step 5: Solve for x
    x = 420,607.54/672.76
  6. Step 6: Final answer
    x = 625.20

Related Problems

Find fourth proportional to 336.38, 464.38 and 226.44
Half scale
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Double scale
Find fourth proportional to 673.76, 930.14 and 453.87
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.