Home / 2,129.60-3,191.15-1,433.70

Finding the Fourth Proportional to 2,129.60, 3,191.15 and 1,433.70

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Solution

The fourth proportional to 2,129.60, 3,191.15 and 1,433.70 is: 2,148.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,129.60 : 3,191.15 = 1,433.70 : x
  2. Step 2: Convert to fraction form
    2,129.60/3,191.15 = 1,433.70/x
  3. Step 3: Cross multiply
    2,129.60x = 3,191.15 × 1,433.70
  4. Step 4: Simplify right side
    2,129.60x = 4,575,155.34
  5. Step 5: Solve for x
    x = 4,575,155.34/2,129.60
  6. Step 6: Final answer
    x = 2,148.36

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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.