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Finding the Fourth Proportional to 552.75, 762.86 and 331.81

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Solution

The fourth proportional to 552.75, 762.86 and 331.81 is: 457.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    552.75 : 762.86 = 331.81 : x
  2. Step 2: Convert to fraction form
    552.75/762.86 = 331.81/x
  3. Step 3: Cross multiply
    552.75x = 762.86 × 331.81
  4. Step 4: Simplify right side
    552.75x = 253,124.58
  5. Step 5: Solve for x
    x = 253,124.58/552.75
  6. Step 6: Final answer
    x = 457.94

Related Problems

Find fourth proportional to 276.38, 381.43 and 165.91
Half scale
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Double scale
Find fourth proportional to 553.75, 764.24 and 332.81
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.