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Finding the Fourth Proportional to 1,015.33, 1,522.59 and 398.83

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Solution

The fourth proportional to 1,015.33, 1,522.59 and 398.83 is: 598.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,015.33 : 1,522.59 = 398.83 : x
  2. Step 2: Convert to fraction form
    1,015.33/1,522.59 = 398.83/x
  3. Step 3: Cross multiply
    1,015.33x = 1,522.59 × 398.83
  4. Step 4: Simplify right side
    1,015.33x = 607,254.57
  5. Step 5: Solve for x
    x = 607,254.57/1,015.33
  6. Step 6: Final answer
    x = 598.09

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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.