Home / 2,587.04-3,880.20-855.68

Finding the Fourth Proportional to 2,587.04, 3,880.20 and 855.68

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Solution

The fourth proportional to 2,587.04, 3,880.20 and 855.68 is: 1,283.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,587.04 : 3,880.20 = 855.68 : x
  2. Step 2: Convert to fraction form
    2,587.04/3,880.20 = 855.68/x
  3. Step 3: Cross multiply
    2,587.04x = 3,880.20 × 855.68
  4. Step 4: Simplify right side
    2,587.04x = 3,320,209.54
  5. Step 5: Solve for x
    x = 3,320,209.54/2,587.04
  6. Step 6: Final answer
    x = 1,283.40

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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.