Home / 2,857.13-4,285.76-1,125.75

Finding the Fourth Proportional to 2,857.13, 4,285.76 and 1,125.75

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Solution

The fourth proportional to 2,857.13, 4,285.76 and 1,125.75 is: 1,688.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,857.13 : 4,285.76 = 1,125.75 : x
  2. Step 2: Convert to fraction form
    2,857.13/4,285.76 = 1,125.75/x
  3. Step 3: Cross multiply
    2,857.13x = 4,285.76 × 1,125.75
  4. Step 4: Simplify right side
    2,857.13x = 4,824,694.32
  5. Step 5: Solve for x
    x = 4,824,694.32/2,857.13
  6. Step 6: Final answer
    x = 1,688.65

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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.