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Finding the Fourth Proportional to 1,045.62, 1,443.20 and 626.22

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Solution

The fourth proportional to 1,045.62, 1,443.20 and 626.22 is: 864.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,045.62 : 1,443.20 = 626.22 : x
  2. Step 2: Convert to fraction form
    1,045.62/1,443.20 = 626.22/x
  3. Step 3: Cross multiply
    1,045.62x = 1,443.20 × 626.22
  4. Step 4: Simplify right side
    1,045.62x = 903,757.57
  5. Step 5: Solve for x
    x = 903,757.57/1,045.62
  6. Step 6: Final answer
    x = 864.33

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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.