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Finding the Fourth Proportional to 545.76, 820 and 484.32

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Solution

The fourth proportional to 545.76, 820 and 484.32 is: 727.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    545.76 : 820 = 484.32 : x
  2. Step 2: Convert to fraction form
    545.76/820 = 484.32/x
  3. Step 3: Cross multiply
    545.76x = 820 × 484.32
  4. Step 4: Simplify right side
    545.76x = 397,142.40
  5. Step 5: Solve for x
    x = 397,142.40/545.76
  6. Step 6: Final answer
    x = 727.69

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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.