Home / 1,489.23-2,053.89-1,292.40

Finding the Fourth Proportional to 1,489.23, 2,053.89 and 1,292.40

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Solution

The fourth proportional to 1,489.23, 2,053.89 and 1,292.40 is: 1,782.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,489.23 : 2,053.89 = 1,292.40 : x
  2. Step 2: Convert to fraction form
    1,489.23/2,053.89 = 1,292.40/x
  3. Step 3: Cross multiply
    1,489.23x = 2,053.89 × 1,292.40
  4. Step 4: Simplify right side
    1,489.23x = 2,654,447.44
  5. Step 5: Solve for x
    x = 2,654,447.44/1,489.23
  6. Step 6: Final answer
    x = 1,782.43

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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.