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Finding the Fourth Proportional to 2,098.57, 3,148.95 and 929.38

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Solution

The fourth proportional to 2,098.57, 3,148.95 and 929.38 is: 1,394.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,098.57 : 3,148.95 = 929.38 : x
  2. Step 2: Convert to fraction form
    2,098.57/3,148.95 = 929.38/x
  3. Step 3: Cross multiply
    2,098.57x = 3,148.95 × 929.38
  4. Step 4: Simplify right side
    2,098.57x = 2,926,572.67
  5. Step 5: Solve for x
    x = 2,926,572.67/2,098.57
  6. Step 6: Final answer
    x = 1,394.56

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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.