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Finding the Fourth Proportional to 1,552.84, 2,143.02 and 889.78

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Solution

The fourth proportional to 1,552.84, 2,143.02 and 889.78 is: 1,227.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,552.84 : 2,143.02 = 889.78 : x
  2. Step 2: Convert to fraction form
    1,552.84/2,143.02 = 889.78/x
  3. Step 3: Cross multiply
    1,552.84x = 2,143.02 × 889.78
  4. Step 4: Simplify right side
    1,552.84x = 1,906,816.34
  5. Step 5: Solve for x
    x = 1,906,816.34/1,552.84
  6. Step 6: Final answer
    x = 1,227.95

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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.