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Finding the Fourth Proportional to 951.98, 1,428.20 and 302.76

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Solution

The fourth proportional to 951.98, 1,428.20 and 302.76 is: 454.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    951.98 : 1,428.20 = 302.76 : x
  2. Step 2: Convert to fraction form
    951.98/1,428.20 = 302.76/x
  3. Step 3: Cross multiply
    951.98x = 1,428.20 × 302.76
  4. Step 4: Simplify right side
    951.98x = 432,400.32
  5. Step 5: Solve for x
    x = 432,400.32/951.98
  6. Step 6: Final answer
    x = 454.21

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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.