Home / 1,538.29-2,119.13-1,223.46

Finding the Fourth Proportional to 1,538.29, 2,119.13 and 1,223.46

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Solution

The fourth proportional to 1,538.29, 2,119.13 and 1,223.46 is: 1,685.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,538.29 : 2,119.13 = 1,223.46 : x
  2. Step 2: Convert to fraction form
    1,538.29/2,119.13 = 1,223.46/x
  3. Step 3: Cross multiply
    1,538.29x = 2,119.13 × 1,223.46
  4. Step 4: Simplify right side
    1,538.29x = 2,592,670.79
  5. Step 5: Solve for x
    x = 2,592,670.79/1,538.29
  6. Step 6: Final answer
    x = 1,685.42

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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.