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Finding the Fourth Proportional to 1,015.78, 1,523.66 and 322.50

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Solution

The fourth proportional to 1,015.78, 1,523.66 and 322.50 is: 483.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,015.78 : 1,523.66 = 322.50 : x
  2. Step 2: Convert to fraction form
    1,015.78/1,523.66 = 322.50/x
  3. Step 3: Cross multiply
    1,015.78x = 1,523.66 × 322.50
  4. Step 4: Simplify right side
    1,015.78x = 491,380.35
  5. Step 5: Solve for x
    x = 491,380.35/1,015.78
  6. Step 6: Final answer
    x = 483.75

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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.