Home / 2,585.78-3,878.64-1,124.91

Finding the Fourth Proportional to 2,585.78, 3,878.64 and 1,124.91

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Solution

The fourth proportional to 2,585.78, 3,878.64 and 1,124.91 is: 1,687.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,585.78 : 3,878.64 = 1,124.91 : x
  2. Step 2: Convert to fraction form
    2,585.78/3,878.64 = 1,124.91/x
  3. Step 3: Cross multiply
    2,585.78x = 3,878.64 × 1,124.91
  4. Step 4: Simplify right side
    2,585.78x = 4,363,120.92
  5. Step 5: Solve for x
    x = 4,363,120.92/2,585.78
  6. Step 6: Final answer
    x = 1,687.36

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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.