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Finding the Fourth Proportional to 951.75, 1,313.38 and 553.36

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Solution

The fourth proportional to 951.75, 1,313.38 and 553.36 is: 763.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    951.75 : 1,313.38 = 553.36 : x
  2. Step 2: Convert to fraction form
    951.75/1,313.38 = 553.36/x
  3. Step 3: Cross multiply
    951.75x = 1,313.38 × 553.36
  4. Step 4: Simplify right side
    951.75x = 726,769.37
  5. Step 5: Solve for x
    x = 726,769.37/951.75
  6. Step 6: Final answer
    x = 763.61

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1.5x scale

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.