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Finding the Fourth Proportional to 1,629.88, 2,248.98 and 921.76

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Solution

The fourth proportional to 1,629.88, 2,248.98 and 921.76 is: 1,271.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,629.88 : 2,248.98 = 921.76 : x
  2. Step 2: Convert to fraction form
    1,629.88/2,248.98 = 921.76/x
  3. Step 3: Cross multiply
    1,629.88x = 2,248.98 × 921.76
  4. Step 4: Simplify right side
    1,629.88x = 2,073,019.80
  5. Step 5: Solve for x
    x = 2,073,019.80/1,629.88
  6. Step 6: Final answer
    x = 1,271.88

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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.