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Finding the Fourth Proportional to 2,046.65, 3,070.20 and 748.40

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Solution

The fourth proportional to 2,046.65, 3,070.20 and 748.40 is: 1,122.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,046.65 : 3,070.20 = 748.40 : x
  2. Step 2: Convert to fraction form
    2,046.65/3,070.20 = 748.40/x
  3. Step 3: Cross multiply
    2,046.65x = 3,070.20 × 748.40
  4. Step 4: Simplify right side
    2,046.65x = 2,297,737.68
  5. Step 5: Solve for x
    x = 2,297,737.68/2,046.65
  6. Step 6: Final answer
    x = 1,122.68

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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.