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Finding the Fourth Proportional to 657.61, 905.95 and 545.15

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Solution

The fourth proportional to 657.61, 905.95 and 545.15 is: 751.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    657.61 : 905.95 = 545.15 : x
  2. Step 2: Convert to fraction form
    657.61/905.95 = 545.15/x
  3. Step 3: Cross multiply
    657.61x = 905.95 × 545.15
  4. Step 4: Simplify right side
    657.61x = 493,881.59
  5. Step 5: Solve for x
    x = 493,881.59/657.61
  6. Step 6: Final answer
    x = 751.03

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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.