Home / 2,569.32-3,855.85-1,985.78

Finding the Fourth Proportional to 2,569.32, 3,855.85 and 1,985.78

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Solution

The fourth proportional to 2,569.32, 3,855.85 and 1,985.78 is: 2,980.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,569.32 : 3,855.85 = 1,985.78 : x
  2. Step 2: Convert to fraction form
    2,569.32/3,855.85 = 1,985.78/x
  3. Step 3: Cross multiply
    2,569.32x = 3,855.85 × 1,985.78
  4. Step 4: Simplify right side
    2,569.32x = 7,656,840.60
  5. Step 5: Solve for x
    x = 7,656,840.60/2,569.32
  6. Step 6: Final answer
    x = 2,980.11

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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.