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Finding the Fourth Proportional to 545.34, 751.98 and 387.93

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Solution

The fourth proportional to 545.34, 751.98 and 387.93 is: 534.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    545.34 : 751.98 = 387.93 : x
  2. Step 2: Convert to fraction form
    545.34/751.98 = 387.93/x
  3. Step 3: Cross multiply
    545.34x = 751.98 × 387.93
  4. Step 4: Simplify right side
    545.34x = 291,715.60
  5. Step 5: Solve for x
    x = 291,715.60/545.34
  6. Step 6: Final answer
    x = 534.92

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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.