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Finding the Fourth Proportional to 1,244.68, 1,717.62 and 685.15

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Solution

The fourth proportional to 1,244.68, 1,717.62 and 685.15 is: 945.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,244.68 : 1,717.62 = 685.15 : x
  2. Step 2: Convert to fraction form
    1,244.68/1,717.62 = 685.15/x
  3. Step 3: Cross multiply
    1,244.68x = 1,717.62 × 685.15
  4. Step 4: Simplify right side
    1,244.68x = 1,176,815.33
  5. Step 5: Solve for x
    x = 1,176,815.33/1,244.68
  6. Step 6: Final answer
    x = 945.48

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1.5x scale

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.