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Finding the Fourth Proportional to 948.13, 1,422.20 and 562.21

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Solution

The fourth proportional to 948.13, 1,422.20 and 562.21 is: 843.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    948.13 : 1,422.20 = 562.21 : x
  2. Step 2: Convert to fraction form
    948.13/1,422.20 = 562.21/x
  3. Step 3: Cross multiply
    948.13x = 1,422.20 × 562.21
  4. Step 4: Simplify right side
    948.13x = 799,575.06
  5. Step 5: Solve for x
    x = 799,575.06/948.13
  6. Step 6: Final answer
    x = 843.32

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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.