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Finding the Fourth Proportional to 951.85, 1,315.74 and 875.31

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Solution

The fourth proportional to 951.85, 1,315.74 and 875.31 is: 1,209.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    951.85 : 1,315.74 = 875.31 : x
  2. Step 2: Convert to fraction form
    951.85/1,315.74 = 875.31/x
  3. Step 3: Cross multiply
    951.85x = 1,315.74 × 875.31
  4. Step 4: Simplify right side
    951.85x = 1,151,680.38
  5. Step 5: Solve for x
    x = 1,151,680.38/951.85
  6. Step 6: Final answer
    x = 1,209.94

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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.