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Finding the Fourth Proportional to 345.03, 517.42 and 125.60

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Solution

The fourth proportional to 345.03, 517.42 and 125.60 is: 188.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    345.03 : 517.42 = 125.60 : x
  2. Step 2: Convert to fraction form
    345.03/517.42 = 125.60/x
  3. Step 3: Cross multiply
    345.03x = 517.42 × 125.60
  4. Step 4: Simplify right side
    345.03x = 64,987.95
  5. Step 5: Solve for x
    x = 64,987.95/345.03
  6. Step 6: Final answer
    x = 188.35

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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.