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Finding the Fourth Proportional to 542.02, 807.48 and 515.90

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Solution

The fourth proportional to 542.02, 807.48 and 515.90 is: 768.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    542.02 : 807.48 = 515.90 : x
  2. Step 2: Convert to fraction form
    542.02/807.48 = 515.90/x
  3. Step 3: Cross multiply
    542.02x = 807.48 × 515.90
  4. Step 4: Simplify right side
    542.02x = 416,574.89
  5. Step 5: Solve for x
    x = 416,574.89/542.02
  6. Step 6: Final answer
    x = 768.56

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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.