Home / 3,123.30-4,310.20-1,779.12

Finding the Fourth Proportional to 3,123.30, 4,310.20 and 1,779.12

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Solution

The fourth proportional to 3,123.30, 4,310.20 and 1,779.12 is: 2,455.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,123.30 : 4,310.20 = 1,779.12 : x
  2. Step 2: Convert to fraction form
    3,123.30/4,310.20 = 1,779.12/x
  3. Step 3: Cross multiply
    3,123.30x = 4,310.20 × 1,779.12
  4. Step 4: Simplify right side
    3,123.30x = 7,668,363.02
  5. Step 5: Solve for x
    x = 7,668,363.02/3,123.30
  6. Step 6: Final answer
    x = 2,455.21

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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.