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Finding the Fourth Proportional to 1,293.75, 1,785.42 and 734.24

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Solution

The fourth proportional to 1,293.75, 1,785.42 and 734.24 is: 1,013.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,293.75 : 1,785.42 = 734.24 : x
  2. Step 2: Convert to fraction form
    1,293.75/1,785.42 = 734.24/x
  3. Step 3: Cross multiply
    1,293.75x = 1,785.42 × 734.24
  4. Step 4: Simplify right side
    1,293.75x = 1,310,928.80
  5. Step 5: Solve for x
    x = 1,310,928.80/1,293.75
  6. Step 6: Final answer
    x = 1,013.28

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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.