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Finding the Fourth Proportional to 1,015.52, 1,401.45 and 622.94

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Solution

The fourth proportional to 1,015.52, 1,401.45 and 622.94 is: 859.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,015.52 : 1,401.45 = 622.94 : x
  2. Step 2: Convert to fraction form
    1,015.52/1,401.45 = 622.94/x
  3. Step 3: Cross multiply
    1,015.52x = 1,401.45 × 622.94
  4. Step 4: Simplify right side
    1,015.52x = 873,019.26
  5. Step 5: Solve for x
    x = 873,019.26/1,015.52
  6. Step 6: Final answer
    x = 859.68

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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.