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Finding the Fourth Proportional to 542.15, 812.73 and 195.40

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Solution

The fourth proportional to 542.15, 812.73 and 195.40 is: 292.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    542.15 : 812.73 = 195.40 : x
  2. Step 2: Convert to fraction form
    542.15/812.73 = 195.40/x
  3. Step 3: Cross multiply
    542.15x = 812.73 × 195.40
  4. Step 4: Simplify right side
    542.15x = 158,807.44
  5. Step 5: Solve for x
    x = 158,807.44/542.15
  6. Step 6: Final answer
    x = 292.92

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.