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Finding the Fourth Proportional to 373.98, 560.84 and 139.70

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Solution

The fourth proportional to 373.98, 560.84 and 139.70 is: 209.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    373.98 : 560.84 = 139.70 : x
  2. Step 2: Convert to fraction form
    373.98/560.84 = 139.70/x
  3. Step 3: Cross multiply
    373.98x = 560.84 × 139.70
  4. Step 4: Simplify right side
    373.98x = 78,345.85
  5. Step 5: Solve for x
    x = 78,345.85/373.98
  6. Step 6: Final answer
    x = 209.49

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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.