Home / 2,587.12-3,877.72-1,285.68

Finding the Fourth Proportional to 2,587.12, 3,877.72 and 1,285.68

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Solution

The fourth proportional to 2,587.12, 3,877.72 and 1,285.68 is: 1,927.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,587.12 : 3,877.72 = 1,285.68 : x
  2. Step 2: Convert to fraction form
    2,587.12/3,877.72 = 1,285.68/x
  3. Step 3: Cross multiply
    2,587.12x = 3,877.72 × 1,285.68
  4. Step 4: Simplify right side
    2,587.12x = 4,985,507.05
  5. Step 5: Solve for x
    x = 4,985,507.05/2,587.12
  6. Step 6: Final answer
    x = 1,927.05

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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.