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Finding the Fourth Proportional to 1,200.86, 1,656.82 and 703.44

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Solution

The fourth proportional to 1,200.86, 1,656.82 and 703.44 is: 970.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,200.86 : 1,656.82 = 703.44 : x
  2. Step 2: Convert to fraction form
    1,200.86/1,656.82 = 703.44/x
  3. Step 3: Cross multiply
    1,200.86x = 1,656.82 × 703.44
  4. Step 4: Simplify right side
    1,200.86x = 1,165,473.46
  5. Step 5: Solve for x
    x = 1,165,473.46/1,200.86
  6. Step 6: Final answer
    x = 970.53

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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.