Home / 1,381.02-2,076.12-1,279.62

Finding the Fourth Proportional to 1,381.02, 2,076.12 and 1,279.62

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Solution

The fourth proportional to 1,381.02, 2,076.12 and 1,279.62 is: 1,923.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,381.02 : 2,076.12 = 1,279.62 : x
  2. Step 2: Convert to fraction form
    1,381.02/2,076.12 = 1,279.62/x
  3. Step 3: Cross multiply
    1,381.02x = 2,076.12 × 1,279.62
  4. Step 4: Simplify right side
    1,381.02x = 2,656,644.67
  5. Step 5: Solve for x
    x = 2,656,644.67/1,381.02
  6. Step 6: Final answer
    x = 1,923.68

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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.