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Finding the Fourth Proportional to 1,042.23, 1,437.81 and 622.37

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Solution

The fourth proportional to 1,042.23, 1,437.81 and 622.37 is: 858.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,042.23 : 1,437.81 = 622.37 : x
  2. Step 2: Convert to fraction form
    1,042.23/1,437.81 = 622.37/x
  3. Step 3: Cross multiply
    1,042.23x = 1,437.81 × 622.37
  4. Step 4: Simplify right side
    1,042.23x = 894,842.62
  5. Step 5: Solve for x
    x = 894,842.62/1,042.23
  6. Step 6: Final answer
    x = 858.58

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.