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Finding the Fourth Proportional to 948.89, 1,423.64 and 401.53

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Solution

The fourth proportional to 948.89, 1,423.64 and 401.53 is: 602.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    948.89 : 1,423.64 = 401.53 : x
  2. Step 2: Convert to fraction form
    948.89/1,423.64 = 401.53/x
  3. Step 3: Cross multiply
    948.89x = 1,423.64 × 401.53
  4. Step 4: Simplify right side
    948.89x = 571,634.17
  5. Step 5: Solve for x
    x = 571,634.17/948.89
  6. Step 6: Final answer
    x = 602.42

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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.