Home / 2,909.30-4,355.38-1,920.29

Finding the Fourth Proportional to 2,909.30, 4,355.38 and 1,920.29

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Solution

The fourth proportional to 2,909.30, 4,355.38 and 1,920.29 is: 2,874.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,909.30 : 4,355.38 = 1,920.29 : x
  2. Step 2: Convert to fraction form
    2,909.30/4,355.38 = 1,920.29/x
  3. Step 3: Cross multiply
    2,909.30x = 4,355.38 × 1,920.29
  4. Step 4: Simplify right side
    2,909.30x = 8,363,583.06
  5. Step 5: Solve for x
    x = 8,363,583.06/2,909.30
  6. Step 6: Final answer
    x = 2,874.78

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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.