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Finding the Fourth Proportional to 2,315.78, 3,472.15 and 1,065.85

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Solution

The fourth proportional to 2,315.78, 3,472.15 and 1,065.85 is: 1,598.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,315.78 : 3,472.15 = 1,065.85 : x
  2. Step 2: Convert to fraction form
    2,315.78/3,472.15 = 1,065.85/x
  3. Step 3: Cross multiply
    2,315.78x = 3,472.15 × 1,065.85
  4. Step 4: Simplify right side
    2,315.78x = 3,700,791.08
  5. Step 5: Solve for x
    x = 3,700,791.08/2,315.78
  6. Step 6: Final answer
    x = 1,598.08

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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.