Home / 2,115.40-3,173.19-654.58

Finding the Fourth Proportional to 2,115.40, 3,173.19 and 654.58

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Solution

The fourth proportional to 2,115.40, 3,173.19 and 654.58 is: 981.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,115.40 : 3,173.19 = 654.58 : x
  2. Step 2: Convert to fraction form
    2,115.40/3,173.19 = 654.58/x
  3. Step 3: Cross multiply
    2,115.40x = 3,173.19 × 654.58
  4. Step 4: Simplify right side
    2,115.40x = 2,077,106.71
  5. Step 5: Solve for x
    x = 2,077,106.71/2,115.40
  6. Step 6: Final answer
    x = 981.90

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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.