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Finding the Fourth Proportional to 545.45, 752.72 and 296.76

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Solution

The fourth proportional to 545.45, 752.72 and 296.76 is: 409.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    545.45 : 752.72 = 296.76 : x
  2. Step 2: Convert to fraction form
    545.45/752.72 = 296.76/x
  3. Step 3: Cross multiply
    545.45x = 752.72 × 296.76
  4. Step 4: Simplify right side
    545.45x = 223,375.70
  5. Step 5: Solve for x
    x = 223,375.70/545.45
  6. Step 6: Final answer
    x = 409.53

Related Problems

Find fourth proportional to 272.72, 376.36 and 148.38
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Double scale
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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.