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Finding the Fourth Proportional to 948.12, 1,422.20 and 371.12

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Solution

The fourth proportional to 948.12, 1,422.20 and 371.12 is: 556.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    948.12 : 1,422.20 = 371.12 : x
  2. Step 2: Convert to fraction form
    948.12/1,422.20 = 371.12/x
  3. Step 3: Cross multiply
    948.12x = 1,422.20 × 371.12
  4. Step 4: Simplify right side
    948.12x = 527,806.86
  5. Step 5: Solve for x
    x = 527,806.86/948.12
  6. Step 6: Final answer
    x = 556.69

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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.