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Finding the Fourth Proportional to 1,042.07, 1,438.14 and 622.55

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Solution

The fourth proportional to 1,042.07, 1,438.14 and 622.55 is: 859.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,042.07 : 1,438.14 = 622.55 : x
  2. Step 2: Convert to fraction form
    1,042.07/1,438.14 = 622.55/x
  3. Step 3: Cross multiply
    1,042.07x = 1,438.14 × 622.55
  4. Step 4: Simplify right side
    1,042.07x = 895,314.06
  5. Step 5: Solve for x
    x = 895,314.06/1,042.07
  6. Step 6: Final answer
    x = 859.17

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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.