Home / 1,431.91-1,971.64-1,253.87

Finding the Fourth Proportional to 1,431.91, 1,971.64 and 1,253.87

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Solution

The fourth proportional to 1,431.91, 1,971.64 and 1,253.87 is: 1,726.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,431.91 : 1,971.64 = 1,253.87 : x
  2. Step 2: Convert to fraction form
    1,431.91/1,971.64 = 1,253.87/x
  3. Step 3: Cross multiply
    1,431.91x = 1,971.64 × 1,253.87
  4. Step 4: Simplify right side
    1,431.91x = 2,472,180.25
  5. Step 5: Solve for x
    x = 2,472,180.25/1,431.91
  6. Step 6: Final answer
    x = 1,726.49

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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.