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Finding the Fourth Proportional to 552.76, 762.78 and 319.88

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Solution

The fourth proportional to 552.76, 762.78 and 319.88 is: 441.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    552.76 : 762.78 = 319.88 : x
  2. Step 2: Convert to fraction form
    552.76/762.78 = 319.88/x
  3. Step 3: Cross multiply
    552.76x = 762.78 × 319.88
  4. Step 4: Simplify right side
    552.76x = 243,998.07
  5. Step 5: Solve for x
    x = 243,998.07/552.76
  6. Step 6: Final answer
    x = 441.42

Related Problems

Find fourth proportional to 276.38, 381.39 and 159.94
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.