Home / 2,279.90-3,146.20-1,395.70

Finding the Fourth Proportional to 2,279.90, 3,146.20 and 1,395.70

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Solution

The fourth proportional to 2,279.90, 3,146.20 and 1,395.70 is: 1,926.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,279.90 : 3,146.20 = 1,395.70 : x
  2. Step 2: Convert to fraction form
    2,279.90/3,146.20 = 1,395.70/x
  3. Step 3: Cross multiply
    2,279.90x = 3,146.20 × 1,395.70
  4. Step 4: Simplify right side
    2,279.90x = 4,391,151.34
  5. Step 5: Solve for x
    x = 4,391,151.34/2,279.90
  6. Step 6: Final answer
    x = 1,926.03

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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.