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Finding the Fourth Proportional to 2,879.92, 4,285.31 and 2,870.20

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Solution

The fourth proportional to 2,879.92, 4,285.31 and 2,870.20 is: 4,270.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,879.92 : 4,285.31 = 2,870.20 : x
  2. Step 2: Convert to fraction form
    2,879.92/4,285.31 = 2,870.20/x
  3. Step 3: Cross multiply
    2,879.92x = 4,285.31 × 2,870.20
  4. Step 4: Simplify right side
    2,879.92x = 12,299,696.76
  5. Step 5: Solve for x
    x = 12,299,696.76/2,879.92
  6. Step 6: Final answer
    x = 4,270.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.