Home / 2,175.04-3,000.30-1,388.20

Finding the Fourth Proportional to 2,175.04, 3,000.30 and 1,388.20

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Solution

The fourth proportional to 2,175.04, 3,000.30 and 1,388.20 is: 1,914.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,175.04 : 3,000.30 = 1,388.20 : x
  2. Step 2: Convert to fraction form
    2,175.04/3,000.30 = 1,388.20/x
  3. Step 3: Cross multiply
    2,175.04x = 3,000.30 × 1,388.20
  4. Step 4: Simplify right side
    2,175.04x = 4,165,016.46
  5. Step 5: Solve for x
    x = 4,165,016.46/2,175.04
  6. Step 6: Final answer
    x = 1,914.91

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1.5x scale

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.