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Finding the Fourth Proportional to 902.76, 1,245.82 and 488.76

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Solution

The fourth proportional to 902.76, 1,245.82 and 488.76 is: 674.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    902.76 : 1,245.82 = 488.76 : x
  2. Step 2: Convert to fraction form
    902.76/1,245.82 = 488.76/x
  3. Step 3: Cross multiply
    902.76x = 1,245.82 × 488.76
  4. Step 4: Simplify right side
    902.76x = 608,906.98
  5. Step 5: Solve for x
    x = 608,906.98/902.76
  6. Step 6: Final answer
    x = 674.49

Related Problems

Find fourth proportional to 451.38, 622.91 and 244.38
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.