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Finding the Fourth Proportional to 1,015.35, 1,522.26 and 398.97

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Solution

The fourth proportional to 1,015.35, 1,522.26 and 398.97 is: 598.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,015.35 : 1,522.26 = 398.97 : x
  2. Step 2: Convert to fraction form
    1,015.35/1,522.26 = 398.97/x
  3. Step 3: Cross multiply
    1,015.35x = 1,522.26 × 398.97
  4. Step 4: Simplify right side
    1,015.35x = 607,336.07
  5. Step 5: Solve for x
    x = 607,336.07/1,015.35
  6. Step 6: Final answer
    x = 598.15

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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.