Home / 2,115.30-3,171.89-654.27

Finding the Fourth Proportional to 2,115.30, 3,171.89 and 654.27

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Solution

The fourth proportional to 2,115.30, 3,171.89 and 654.27 is: 981.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,115.30 : 3,171.89 = 654.27 : x
  2. Step 2: Convert to fraction form
    2,115.30/3,171.89 = 654.27/x
  3. Step 3: Cross multiply
    2,115.30x = 3,171.89 × 654.27
  4. Step 4: Simplify right side
    2,115.30x = 2,075,269.20
  5. Step 5: Solve for x
    x = 2,075,269.20/2,115.30
  6. Step 6: Final answer
    x = 981.08

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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.