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Finding the Fourth Proportional to 2,261.46, 3,391 and 800.40

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Solution

The fourth proportional to 2,261.46, 3,391 and 800.40 is: 1,200.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,261.46 : 3,391 = 800.40 : x
  2. Step 2: Convert to fraction form
    2,261.46/3,391 = 800.40/x
  3. Step 3: Cross multiply
    2,261.46x = 3,391 × 800.40
  4. Step 4: Simplify right side
    2,261.46x = 2,714,156.40
  5. Step 5: Solve for x
    x = 2,714,156.40/2,261.46
  6. Step 6: Final answer
    x = 1,200.18

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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.