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Finding the Fourth Proportional to 545.12, 752.86 and 474.85

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Solution

The fourth proportional to 545.12, 752.86 and 474.85 is: 655.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    545.12 : 752.86 = 474.85 : x
  2. Step 2: Convert to fraction form
    545.12/752.86 = 474.85/x
  3. Step 3: Cross multiply
    545.12x = 752.86 × 474.85
  4. Step 4: Simplify right side
    545.12x = 357,495.57
  5. Step 5: Solve for x
    x = 357,495.57/545.12
  6. Step 6: Final answer
    x = 655.81

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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.