Home / 1,461.06-2,191.41-639.18

Finding the Fourth Proportional to 1,461.06, 2,191.41 and 639.18

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Solution

The fourth proportional to 1,461.06, 2,191.41 and 639.18 is: 958.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,461.06 : 2,191.41 = 639.18 : x
  2. Step 2: Convert to fraction form
    1,461.06/2,191.41 = 639.18/x
  3. Step 3: Cross multiply
    1,461.06x = 2,191.41 × 639.18
  4. Step 4: Simplify right side
    1,461.06x = 1,400,705.44
  5. Step 5: Solve for x
    x = 1,400,705.44/1,461.06
  6. Step 6: Final answer
    x = 958.69

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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.