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Finding the Fourth Proportional to 1,195.15, 1,648.94 and 697.68

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Solution

The fourth proportional to 1,195.15, 1,648.94 and 697.68 is: 962.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,195.15 : 1,648.94 = 697.68 : x
  2. Step 2: Convert to fraction form
    1,195.15/1,648.94 = 697.68/x
  3. Step 3: Cross multiply
    1,195.15x = 1,648.94 × 697.68
  4. Step 4: Simplify right side
    1,195.15x = 1,150,420.73
  5. Step 5: Solve for x
    x = 1,150,420.73/1,195.15
  6. Step 6: Final answer
    x = 962.57

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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.