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Finding the Fourth Proportional to 548.88, 817.46 and 542.40

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Solution

The fourth proportional to 548.88, 817.46 and 542.40 is: 807.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    548.88 : 817.46 = 542.40 : x
  2. Step 2: Convert to fraction form
    548.88/817.46 = 542.40/x
  3. Step 3: Cross multiply
    548.88x = 817.46 × 542.40
  4. Step 4: Simplify right side
    548.88x = 443,387.59
  5. Step 5: Solve for x
    x = 443,387.59/548.88
  6. Step 6: Final answer
    x = 807.80

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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.