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Finding the Fourth Proportional to 951.47, 1,427.28 and 302.21

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Solution

The fourth proportional to 951.47, 1,427.28 and 302.21 is: 453.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    951.47 : 1,427.28 = 302.21 : x
  2. Step 2: Convert to fraction form
    951.47/1,427.28 = 302.21/x
  3. Step 3: Cross multiply
    951.47x = 1,427.28 × 302.21
  4. Step 4: Simplify right side
    951.47x = 431,335.37
  5. Step 5: Solve for x
    x = 431,335.37/951.47
  6. Step 6: Final answer
    x = 453.34

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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.