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Finding the Fourth Proportional to 555.46, 766.46 and 331.39

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Solution

The fourth proportional to 555.46, 766.46 and 331.39 is: 457.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    555.46 : 766.46 = 331.39 : x
  2. Step 2: Convert to fraction form
    555.46/766.46 = 331.39/x
  3. Step 3: Cross multiply
    555.46x = 766.46 × 331.39
  4. Step 4: Simplify right side
    555.46x = 253,998.97
  5. Step 5: Solve for x
    x = 253,998.97/555.46
  6. Step 6: Final answer
    x = 457.28

Related Problems

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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.