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Finding the Fourth Proportional to 514.96, 710.82 and 328.78

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Solution

The fourth proportional to 514.96, 710.82 and 328.78 is: 453.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    514.96 : 710.82 = 328.78 : x
  2. Step 2: Convert to fraction form
    514.96/710.82 = 328.78/x
  3. Step 3: Cross multiply
    514.96x = 710.82 × 328.78
  4. Step 4: Simplify right side
    514.96x = 233,703.40
  5. Step 5: Solve for x
    x = 233,703.40/514.96
  6. Step 6: Final answer
    x = 453.83

Related Problems

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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.