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Finding the Fourth Proportional to 951.40, 1,311.93 and 653.08

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Solution

The fourth proportional to 951.40, 1,311.93 and 653.08 is: 900.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    951.40 : 1,311.93 = 653.08 : x
  2. Step 2: Convert to fraction form
    951.40/1,311.93 = 653.08/x
  3. Step 3: Cross multiply
    951.40x = 1,311.93 × 653.08
  4. Step 4: Simplify right side
    951.40x = 856,795.24
  5. Step 5: Solve for x
    x = 856,795.24/951.40
  6. Step 6: Final answer
    x = 900.56

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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.