Home / 1,446.05-2,160.28-921.87

Finding the Fourth Proportional to 1,446.05, 2,160.28 and 921.87

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Solution

The fourth proportional to 1,446.05, 2,160.28 and 921.87 is: 1,377.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,446.05 : 2,160.28 = 921.87 : x
  2. Step 2: Convert to fraction form
    1,446.05/2,160.28 = 921.87/x
  3. Step 3: Cross multiply
    1,446.05x = 2,160.28 × 921.87
  4. Step 4: Simplify right side
    1,446.05x = 1,991,495.02
  5. Step 5: Solve for x
    x = 1,991,495.02/1,446.05
  6. Step 6: Final answer
    x = 1,377.20

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.