Home / 1,431.29-2,146.89-457.37

Finding the Fourth Proportional to 1,431.29, 2,146.89 and 457.37

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Solution

The fourth proportional to 1,431.29, 2,146.89 and 457.37 is: 686.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,431.29 : 2,146.89 = 457.37 : x
  2. Step 2: Convert to fraction form
    1,431.29/2,146.89 = 457.37/x
  3. Step 3: Cross multiply
    1,431.29x = 2,146.89 × 457.37
  4. Step 4: Simplify right side
    1,431.29x = 981,912.34
  5. Step 5: Solve for x
    x = 981,912.34/1,431.29
  6. Step 6: Final answer
    x = 686.04

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.