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Finding the Fourth Proportional to 951.19, 1,423.68 and 511.81

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Solution

The fourth proportional to 951.19, 1,423.68 and 511.81 is: 766.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    951.19 : 1,423.68 = 511.81 : x
  2. Step 2: Convert to fraction form
    951.19/1,423.68 = 511.81/x
  3. Step 3: Cross multiply
    951.19x = 1,423.68 × 511.81
  4. Step 4: Simplify right side
    951.19x = 728,653.66
  5. Step 5: Solve for x
    x = 728,653.66/951.19
  6. Step 6: Final answer
    x = 766.04

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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.