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Finding the Fourth Proportional to 1,015.66, 1,522.91 and 322.50

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Solution

The fourth proportional to 1,015.66, 1,522.91 and 322.50 is: 483.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,015.66 : 1,522.91 = 322.50 : x
  2. Step 2: Convert to fraction form
    1,015.66/1,522.91 = 322.50/x
  3. Step 3: Cross multiply
    1,015.66x = 1,522.91 × 322.50
  4. Step 4: Simplify right side
    1,015.66x = 491,138.48
  5. Step 5: Solve for x
    x = 491,138.48/1,015.66
  6. Step 6: Final answer
    x = 483.57

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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.