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Finding the Fourth Proportional to 552.76, 762.80 and 319.88

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Solution

The fourth proportional to 552.76, 762.80 and 319.88 is: 441.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    552.76 : 762.80 = 319.88 : x
  2. Step 2: Convert to fraction form
    552.76/762.80 = 319.88/x
  3. Step 3: Cross multiply
    552.76x = 762.80 × 319.88
  4. Step 4: Simplify right side
    552.76x = 244,004.46
  5. Step 5: Solve for x
    x = 244,004.46/552.76
  6. Step 6: Final answer
    x = 441.43

Related Problems

Find fourth proportional to 276.38, 381.40 and 159.94
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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.