Home / 1,456.79-2,185.18-1,239.91

Finding the Fourth Proportional to 1,456.79, 2,185.18 and 1,239.91

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Solution

The fourth proportional to 1,456.79, 2,185.18 and 1,239.91 is: 1,859.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,456.79 : 2,185.18 = 1,239.91 : x
  2. Step 2: Convert to fraction form
    1,456.79/2,185.18 = 1,239.91/x
  3. Step 3: Cross multiply
    1,456.79x = 2,185.18 × 1,239.91
  4. Step 4: Simplify right side
    1,456.79x = 2,709,417.97
  5. Step 5: Solve for x
    x = 2,709,417.97/1,456.79
  6. Step 6: Final answer
    x = 1,859.86

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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.