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Finding the Fourth Proportional to 1,014.23, 1,399.64 and 572.15

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Solution

The fourth proportional to 1,014.23, 1,399.64 and 572.15 is: 789.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,014.23 : 1,399.64 = 572.15 : x
  2. Step 2: Convert to fraction form
    1,014.23/1,399.64 = 572.15/x
  3. Step 3: Cross multiply
    1,014.23x = 1,399.64 × 572.15
  4. Step 4: Simplify right side
    1,014.23x = 800,794.17
  5. Step 5: Solve for x
    x = 800,794.17/1,014.23
  6. Step 6: Final answer
    x = 789.56

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.