Home / 1,515-2,089.89-1,016.78

Finding the Fourth Proportional to 1,515, 2,089.89 and 1,016.78

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Solution

The fourth proportional to 1,515, 2,089.89 and 1,016.78 is: 1,402.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,515 : 2,089.89 = 1,016.78 : x
  2. Step 2: Convert to fraction form
    1,515/2,089.89 = 1,016.78/x
  3. Step 3: Cross multiply
    1,515x = 2,089.89 × 1,016.78
  4. Step 4: Simplify right side
    1,515x = 2,124,963.58
  5. Step 5: Solve for x
    x = 2,124,963.58/1,515
  6. Step 6: Final answer
    x = 1,402.62

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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.