Home / 2,575.80-3,553.50-1,985.40

Finding the Fourth Proportional to 2,575.80, 3,553.50 and 1,985.40

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Solution

The fourth proportional to 2,575.80, 3,553.50 and 1,985.40 is: 2,739.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,575.80 : 3,553.50 = 1,985.40 : x
  2. Step 2: Convert to fraction form
    2,575.80/3,553.50 = 1,985.40/x
  3. Step 3: Cross multiply
    2,575.80x = 3,553.50 × 1,985.40
  4. Step 4: Simplify right side
    2,575.80x = 7,055,118.90
  5. Step 5: Solve for x
    x = 7,055,118.90/2,575.80
  6. Step 6: Final answer
    x = 2,739.00

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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.