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Finding the Fourth Proportional to 948.68, 1,423.79 and 401.22

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Solution

The fourth proportional to 948.68, 1,423.79 and 401.22 is: 602.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    948.68 : 1,423.79 = 401.22 : x
  2. Step 2: Convert to fraction form
    948.68/1,423.79 = 401.22/x
  3. Step 3: Cross multiply
    948.68x = 1,423.79 × 401.22
  4. Step 4: Simplify right side
    948.68x = 571,251.02
  5. Step 5: Solve for x
    x = 571,251.02/948.68
  6. Step 6: Final answer
    x = 602.16

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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.