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Finding the Fourth Proportional to 1,658.54, 2,288.81 and 912.57

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Solution

The fourth proportional to 1,658.54, 2,288.81 and 912.57 is: 1,259.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,658.54 : 2,288.81 = 912.57 : x
  2. Step 2: Convert to fraction form
    1,658.54/2,288.81 = 912.57/x
  3. Step 3: Cross multiply
    1,658.54x = 2,288.81 × 912.57
  4. Step 4: Simplify right side
    1,658.54x = 2,088,694.78
  5. Step 5: Solve for x
    x = 2,088,694.78/1,658.54
  6. Step 6: Final answer
    x = 1,259.36

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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.