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Finding the Fourth Proportional to 545.56, 817.55 and 253.15

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Solution

The fourth proportional to 545.56, 817.55 and 253.15 is: 379.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    545.56 : 817.55 = 253.15 : x
  2. Step 2: Convert to fraction form
    545.56/817.55 = 253.15/x
  3. Step 3: Cross multiply
    545.56x = 817.55 × 253.15
  4. Step 4: Simplify right side
    545.56x = 206,962.78
  5. Step 5: Solve for x
    x = 206,962.78/545.56
  6. Step 6: Final answer
    x = 379.36

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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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.