Home / 3,521.70-5,279.31-1,788.30

Finding the Fourth Proportional to 3,521.70, 5,279.31 and 1,788.30

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Solution

The fourth proportional to 3,521.70, 5,279.31 and 1,788.30 is: 2,680.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,521.70 : 5,279.31 = 1,788.30 : x
  2. Step 2: Convert to fraction form
    3,521.70/5,279.31 = 1,788.30/x
  3. Step 3: Cross multiply
    3,521.70x = 5,279.31 × 1,788.30
  4. Step 4: Simplify right side
    3,521.70x = 9,440,990.07
  5. Step 5: Solve for x
    x = 9,440,990.07/3,521.70
  6. Step 6: Final answer
    x = 2,680.80

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1.5x scale

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.