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Finding the Fourth Proportional to 1,641.51, 2,459.90 and 1,223.15

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Solution

The fourth proportional to 1,641.51, 2,459.90 and 1,223.15 is: 1,832.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,641.51 : 2,459.90 = 1,223.15 : x
  2. Step 2: Convert to fraction form
    1,641.51/2,459.90 = 1,223.15/x
  3. Step 3: Cross multiply
    1,641.51x = 2,459.90 × 1,223.15
  4. Step 4: Simplify right side
    1,641.51x = 3,008,817.44
  5. Step 5: Solve for x
    x = 3,008,817.44/1,641.51
  6. Step 6: Final answer
    x = 1,832.96

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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.