Home / 3,985.20-5,977.08-1,678.32

Finding the Fourth Proportional to 3,985.20, 5,977.08 and 1,678.32

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Solution

The fourth proportional to 3,985.20, 5,977.08 and 1,678.32 is: 2,517.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,985.20 : 5,977.08 = 1,678.32 : x
  2. Step 2: Convert to fraction form
    3,985.20/5,977.08 = 1,678.32/x
  3. Step 3: Cross multiply
    3,985.20x = 5,977.08 × 1,678.32
  4. Step 4: Simplify right side
    3,985.20x = 10,031,452.91
  5. Step 5: Solve for x
    x = 10,031,452.91/3,985.20
  6. Step 6: Final answer
    x = 2,517.18

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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.