Home / 1,629.64-2,248.51-921.49

Finding the Fourth Proportional to 1,629.64, 2,248.51 and 921.49

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Solution

The fourth proportional to 1,629.64, 2,248.51 and 921.49 is: 1,271.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,629.64 : 2,248.51 = 921.49 : x
  2. Step 2: Convert to fraction form
    1,629.64/2,248.51 = 921.49/x
  3. Step 3: Cross multiply
    1,629.64x = 2,248.51 × 921.49
  4. Step 4: Simplify right side
    1,629.64x = 2,071,979.48
  5. Step 5: Solve for x
    x = 2,071,979.48/1,629.64
  6. Step 6: Final answer
    x = 1,271.43

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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.