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Finding the Fourth Proportional to 1,302.32, 1,797.20 and 712.86

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Solution

The fourth proportional to 1,302.32, 1,797.20 and 712.86 is: 983.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,302.32 : 1,797.20 = 712.86 : x
  2. Step 2: Convert to fraction form
    1,302.32/1,797.20 = 712.86/x
  3. Step 3: Cross multiply
    1,302.32x = 1,797.20 × 712.86
  4. Step 4: Simplify right side
    1,302.32x = 1,281,149.05
  5. Step 5: Solve for x
    x = 1,281,149.05/1,302.32
  6. Step 6: Final answer
    x = 983.74

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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.