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Finding the Fourth Proportional to 951.84, 1,313.04 and 718.56

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Solution

The fourth proportional to 951.84, 1,313.04 and 718.56 is: 991.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    951.84 : 1,313.04 = 718.56 : x
  2. Step 2: Convert to fraction form
    951.84/1,313.04 = 718.56/x
  3. Step 3: Cross multiply
    951.84x = 1,313.04 × 718.56
  4. Step 4: Simplify right side
    951.84x = 943,498.02
  5. Step 5: Solve for x
    x = 943,498.02/951.84
  6. Step 6: Final answer
    x = 991.24

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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.