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Finding the Fourth Proportional to 918.92, 1,266.63 and 752.84

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Solution

The fourth proportional to 918.92, 1,266.63 and 752.84 is: 1,037.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    918.92 : 1,266.63 = 752.84 : x
  2. Step 2: Convert to fraction form
    918.92/1,266.63 = 752.84/x
  3. Step 3: Cross multiply
    918.92x = 1,266.63 × 752.84
  4. Step 4: Simplify right side
    918.92x = 953,569.73
  5. Step 5: Solve for x
    x = 953,569.73/918.92
  6. Step 6: Final answer
    x = 1,037.71

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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.