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Finding the Fourth Proportional to 672.75, 928.97 and 424.49

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Solution

The fourth proportional to 672.75, 928.97 and 424.49 is: 586.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    672.75 : 928.97 = 424.49 : x
  2. Step 2: Convert to fraction form
    672.75/928.97 = 424.49/x
  3. Step 3: Cross multiply
    672.75x = 928.97 × 424.49
  4. Step 4: Simplify right side
    672.75x = 394,331.71
  5. Step 5: Solve for x
    x = 394,331.71/672.75
  6. Step 6: Final answer
    x = 586.15

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Find fourth proportional to 336.38, 464.48 and 212.24
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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.