Home / 2,390.19-3,586.20-830.36

Finding the Fourth Proportional to 2,390.19, 3,586.20 and 830.36

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Solution

The fourth proportional to 2,390.19, 3,586.20 and 830.36 is: 1,245.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,390.19 : 3,586.20 = 830.36 : x
  2. Step 2: Convert to fraction form
    2,390.19/3,586.20 = 830.36/x
  3. Step 3: Cross multiply
    2,390.19x = 3,586.20 × 830.36
  4. Step 4: Simplify right side
    2,390.19x = 2,977,819.10
  5. Step 5: Solve for x
    x = 2,977,819.10/2,390.19
  6. Step 6: Final answer
    x = 1,245.85

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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.