Home / 1,873.90-2,585.40-1,087.80

Finding the Fourth Proportional to 1,873.90, 2,585.40 and 1,087.80

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Solution

The fourth proportional to 1,873.90, 2,585.40 and 1,087.80 is: 1,500.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,873.90 : 2,585.40 = 1,087.80 : x
  2. Step 2: Convert to fraction form
    1,873.90/2,585.40 = 1,087.80/x
  3. Step 3: Cross multiply
    1,873.90x = 2,585.40 × 1,087.80
  4. Step 4: Simplify right side
    1,873.90x = 2,812,398.12
  5. Step 5: Solve for x
    x = 2,812,398.12/1,873.90
  6. Step 6: Final answer
    x = 1,500.83

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.