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Finding the Fourth Proportional to 2,130.73, 3,195.18 and 743.65

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Solution

The fourth proportional to 2,130.73, 3,195.18 and 743.65 is: 1,115.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,130.73 : 3,195.18 = 743.65 : x
  2. Step 2: Convert to fraction form
    2,130.73/3,195.18 = 743.65/x
  3. Step 3: Cross multiply
    2,130.73x = 3,195.18 × 743.65
  4. Step 4: Simplify right side
    2,130.73x = 2,376,095.61
  5. Step 5: Solve for x
    x = 2,376,095.61/2,130.73
  6. Step 6: Final answer
    x = 1,115.16

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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.