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Finding the Fourth Proportional to 545.68, 812.35 and 542.43

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Solution

The fourth proportional to 545.68, 812.35 and 542.43 is: 807.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    545.68 : 812.35 = 542.43 : x
  2. Step 2: Convert to fraction form
    545.68/812.35 = 542.43/x
  3. Step 3: Cross multiply
    545.68x = 812.35 × 542.43
  4. Step 4: Simplify right side
    545.68x = 440,643.68
  5. Step 5: Solve for x
    x = 440,643.68/545.68
  6. Step 6: Final answer
    x = 807.52

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.