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Finding the Fourth Proportional to 1,200.95, 1,657.36 and 676.97

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Solution

The fourth proportional to 1,200.95, 1,657.36 and 676.97 is: 934.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,200.95 : 1,657.36 = 676.97 : x
  2. Step 2: Convert to fraction form
    1,200.95/1,657.36 = 676.97/x
  3. Step 3: Cross multiply
    1,200.95x = 1,657.36 × 676.97
  4. Step 4: Simplify right side
    1,200.95x = 1,121,973.02
  5. Step 5: Solve for x
    x = 1,121,973.02/1,200.95
  6. Step 6: Final answer
    x = 934.24

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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.