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Finding the Fourth Proportional to 1,445.07, 2,168.29 and 751.61

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Solution

The fourth proportional to 1,445.07, 2,168.29 and 751.61 is: 1,127.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,445.07 : 2,168.29 = 751.61 : x
  2. Step 2: Convert to fraction form
    1,445.07/2,168.29 = 751.61/x
  3. Step 3: Cross multiply
    1,445.07x = 2,168.29 × 751.61
  4. Step 4: Simplify right side
    1,445.07x = 1,629,708.45
  5. Step 5: Solve for x
    x = 1,629,708.45/1,445.07
  6. Step 6: Final answer
    x = 1,127.77

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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.