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Finding the Fourth Proportional to 2,641.04, 3,962.40 and 1,408.40

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Solution

The fourth proportional to 2,641.04, 3,962.40 and 1,408.40 is: 2,113.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,641.04 : 3,962.40 = 1,408.40 : x
  2. Step 2: Convert to fraction form
    2,641.04/3,962.40 = 1,408.40/x
  3. Step 3: Cross multiply
    2,641.04x = 3,962.40 × 1,408.40
  4. Step 4: Simplify right side
    2,641.04x = 5,580,644.16
  5. Step 5: Solve for x
    x = 5,580,644.16/2,641.04
  6. Step 6: Final answer
    x = 2,113.05

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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.