Home / 1,551.33-2,140.61-921.87

Finding the Fourth Proportional to 1,551.33, 2,140.61 and 921.87

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Solution

The fourth proportional to 1,551.33, 2,140.61 and 921.87 is: 1,272.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,551.33 : 2,140.61 = 921.87 : x
  2. Step 2: Convert to fraction form
    1,551.33/2,140.61 = 921.87/x
  3. Step 3: Cross multiply
    1,551.33x = 2,140.61 × 921.87
  4. Step 4: Simplify right side
    1,551.33x = 1,973,359.53
  5. Step 5: Solve for x
    x = 1,973,359.53/1,551.33
  6. Step 6: Final answer
    x = 1,272.04

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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.