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Finding the Fourth Proportional to 1,292.97, 1,784.32 and 703.52

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Solution

The fourth proportional to 1,292.97, 1,784.32 and 703.52 is: 970.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,292.97 : 1,784.32 = 703.52 : x
  2. Step 2: Convert to fraction form
    1,292.97/1,784.32 = 703.52/x
  3. Step 3: Cross multiply
    1,292.97x = 1,784.32 × 703.52
  4. Step 4: Simplify right side
    1,292.97x = 1,255,304.81
  5. Step 5: Solve for x
    x = 1,255,304.81/1,292.97
  6. Step 6: Final answer
    x = 970.87

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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.