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Finding the Fourth Proportional to 545.08, 816.80 and 479.76

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Solution

The fourth proportional to 545.08, 816.80 and 479.76 is: 718.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    545.08 : 816.80 = 479.76 : x
  2. Step 2: Convert to fraction form
    545.08/816.80 = 479.76/x
  3. Step 3: Cross multiply
    545.08x = 816.80 × 479.76
  4. Step 4: Simplify right side
    545.08x = 391,867.97
  5. Step 5: Solve for x
    x = 391,867.97/545.08
  6. Step 6: Final answer
    x = 718.92

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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.