Home / 2,872.89-4,309.20-1,140.30

Finding the Fourth Proportional to 2,872.89, 4,309.20 and 1,140.30

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Solution

The fourth proportional to 2,872.89, 4,309.20 and 1,140.30 is: 1,710.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,872.89 : 4,309.20 = 1,140.30 : x
  2. Step 2: Convert to fraction form
    2,872.89/4,309.20 = 1,140.30/x
  3. Step 3: Cross multiply
    2,872.89x = 4,309.20 × 1,140.30
  4. Step 4: Simplify right side
    2,872.89x = 4,913,780.76
  5. Step 5: Solve for x
    x = 4,913,780.76/2,872.89
  6. Step 6: Final answer
    x = 1,710.40

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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.