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Finding the Fourth Proportional to 1,220.78, 1,832.10 and 635.93

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Solution

The fourth proportional to 1,220.78, 1,832.10 and 635.93 is: 954.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,220.78 : 1,832.10 = 635.93 : x
  2. Step 2: Convert to fraction form
    1,220.78/1,832.10 = 635.93/x
  3. Step 3: Cross multiply
    1,220.78x = 1,832.10 × 635.93
  4. Step 4: Simplify right side
    1,220.78x = 1,165,080.58
  5. Step 5: Solve for x
    x = 1,165,080.58/1,220.78
  6. Step 6: Final answer
    x = 954.38

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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.