Home / 2,175.50-3,001.26-1,428.50

Finding the Fourth Proportional to 2,175.50, 3,001.26 and 1,428.50

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Solution

The fourth proportional to 2,175.50, 3,001.26 and 1,428.50 is: 1,970.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,175.50 : 3,001.26 = 1,428.50 : x
  2. Step 2: Convert to fraction form
    2,175.50/3,001.26 = 1,428.50/x
  3. Step 3: Cross multiply
    2,175.50x = 3,001.26 × 1,428.50
  4. Step 4: Simplify right side
    2,175.50x = 4,287,299.91
  5. Step 5: Solve for x
    x = 4,287,299.91/2,175.50
  6. Step 6: Final answer
    x = 1,970.72

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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.