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Finding the Fourth Proportional to 951.94, 1,315.89 and 913.18

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Solution

The fourth proportional to 951.94, 1,315.89 and 913.18 is: 1,262.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    951.94 : 1,315.89 = 913.18 : x
  2. Step 2: Convert to fraction form
    951.94/1,315.89 = 913.18/x
  3. Step 3: Cross multiply
    951.94x = 1,315.89 × 913.18
  4. Step 4: Simplify right side
    951.94x = 1,201,644.43
  5. Step 5: Solve for x
    x = 1,201,644.43/951.94
  6. Step 6: Final answer
    x = 1,262.31

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.