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Finding the Fourth Proportional to 542.07, 747.63 and 345.60

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Solution

The fourth proportional to 542.07, 747.63 and 345.60 is: 476.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    542.07 : 747.63 = 345.60 : x
  2. Step 2: Convert to fraction form
    542.07/747.63 = 345.60/x
  3. Step 3: Cross multiply
    542.07x = 747.63 × 345.60
  4. Step 4: Simplify right side
    542.07x = 258,380.93
  5. Step 5: Solve for x
    x = 258,380.93/542.07
  6. Step 6: Final answer
    x = 476.66

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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.