Home / 2,890.85-4,332.12-1,428.29

Finding the Fourth Proportional to 2,890.85, 4,332.12 and 1,428.29

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Solution

The fourth proportional to 2,890.85, 4,332.12 and 1,428.29 is: 2,140.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,890.85 : 4,332.12 = 1,428.29 : x
  2. Step 2: Convert to fraction form
    2,890.85/4,332.12 = 1,428.29/x
  3. Step 3: Cross multiply
    2,890.85x = 4,332.12 × 1,428.29
  4. Step 4: Simplify right side
    2,890.85x = 6,187,512.90
  5. Step 5: Solve for x
    x = 6,187,512.90/2,890.85
  6. Step 6: Final answer
    x = 2,140.38

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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.