Home / 1,320.09-1,982.18-1,261.66

Finding the Fourth Proportional to 1,320.09, 1,982.18 and 1,261.66

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Solution

The fourth proportional to 1,320.09, 1,982.18 and 1,261.66 is: 1,894.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,320.09 : 1,982.18 = 1,261.66 : x
  2. Step 2: Convert to fraction form
    1,320.09/1,982.18 = 1,261.66/x
  3. Step 3: Cross multiply
    1,320.09x = 1,982.18 × 1,261.66
  4. Step 4: Simplify right side
    1,320.09x = 2,500,835.42
  5. Step 5: Solve for x
    x = 2,500,835.42/1,320.09
  6. Step 6: Final answer
    x = 1,894.44

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.