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Finding the Fourth Proportional to 1,447.18, 2,170.95 and 472.95

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Solution

The fourth proportional to 1,447.18, 2,170.95 and 472.95 is: 709.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,447.18 : 2,170.95 = 472.95 : x
  2. Step 2: Convert to fraction form
    1,447.18/2,170.95 = 472.95/x
  3. Step 3: Cross multiply
    1,447.18x = 2,170.95 × 472.95
  4. Step 4: Simplify right side
    1,447.18x = 1,026,750.80
  5. Step 5: Solve for x
    x = 1,026,750.80/1,447.18
  6. Step 6: Final answer
    x = 709.48

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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.