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Finding the Fourth Proportional to 1,014.14, 1,399.65 and 572.15

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Solution

The fourth proportional to 1,014.14, 1,399.65 and 572.15 is: 789.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,014.14 : 1,399.65 = 572.15 : x
  2. Step 2: Convert to fraction form
    1,014.14/1,399.65 = 572.15/x
  3. Step 3: Cross multiply
    1,014.14x = 1,399.65 × 572.15
  4. Step 4: Simplify right side
    1,014.14x = 800,809.75
  5. Step 5: Solve for x
    x = 800,809.75/1,014.14
  6. Step 6: Final answer
    x = 789.64

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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.