Home / 2,585.60-3,875.92-1,285.80

Finding the Fourth Proportional to 2,585.60, 3,875.92 and 1,285.80

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Solution

The fourth proportional to 2,585.60, 3,875.92 and 1,285.80 is: 1,927.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,585.60 : 3,875.92 = 1,285.80 : x
  2. Step 2: Convert to fraction form
    2,585.60/3,875.92 = 1,285.80/x
  3. Step 3: Cross multiply
    2,585.60x = 3,875.92 × 1,285.80
  4. Step 4: Simplify right side
    2,585.60x = 4,983,657.94
  5. Step 5: Solve for x
    x = 4,983,657.94/2,585.60
  6. Step 6: Final answer
    x = 1,927.47

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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.