Home / 2,175.80-3,002.40-1,291.46

Finding the Fourth Proportional to 2,175.80, 3,002.40 and 1,291.46

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Solution

The fourth proportional to 2,175.80, 3,002.40 and 1,291.46 is: 1,782.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,175.80 : 3,002.40 = 1,291.46 : x
  2. Step 2: Convert to fraction form
    2,175.80/3,002.40 = 1,291.46/x
  3. Step 3: Cross multiply
    2,175.80x = 3,002.40 × 1,291.46
  4. Step 4: Simplify right side
    2,175.80x = 3,877,464.49
  5. Step 5: Solve for x
    x = 3,877,464.49/2,175.80
  6. Step 6: Final answer
    x = 1,782.09

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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.