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Finding the Fourth Proportional to 1,442.22, 2,161.92 and 783.50

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Solution

The fourth proportional to 1,442.22, 2,161.92 and 783.50 is: 1,174.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,442.22 : 2,161.92 = 783.50 : x
  2. Step 2: Convert to fraction form
    1,442.22/2,161.92 = 783.50/x
  3. Step 3: Cross multiply
    1,442.22x = 2,161.92 × 783.50
  4. Step 4: Simplify right side
    1,442.22x = 1,693,864.32
  5. Step 5: Solve for x
    x = 1,693,864.32/1,442.22
  6. Step 6: Final answer
    x = 1,174.48

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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.