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Finding the Fourth Proportional to 1,015.27, 1,522.94 and 398.99

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Solution

The fourth proportional to 1,015.27, 1,522.94 and 398.99 is: 598.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,015.27 : 1,522.94 = 398.99 : x
  2. Step 2: Convert to fraction form
    1,015.27/1,522.94 = 398.99/x
  3. Step 3: Cross multiply
    1,015.27x = 1,522.94 × 398.99
  4. Step 4: Simplify right side
    1,015.27x = 607,639.64
  5. Step 5: Solve for x
    x = 607,639.64/1,015.27
  6. Step 6: Final answer
    x = 598.50

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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.