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Finding the Fourth Proportional to 1,213.13, 1,673.67 and 793.72

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Solution

The fourth proportional to 1,213.13, 1,673.67 and 793.72 is: 1,095.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,213.13 : 1,673.67 = 793.72 : x
  2. Step 2: Convert to fraction form
    1,213.13/1,673.67 = 793.72/x
  3. Step 3: Cross multiply
    1,213.13x = 1,673.67 × 793.72
  4. Step 4: Simplify right side
    1,213.13x = 1,328,421.17
  5. Step 5: Solve for x
    x = 1,328,421.17/1,213.13
  6. Step 6: Final answer
    x = 1,095.04

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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.