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Finding the Fourth Proportional to 1,014.15, 1,399.32 and 660.14

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Solution

The fourth proportional to 1,014.15, 1,399.32 and 660.14 is: 910.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,014.15 : 1,399.32 = 660.14 : x
  2. Step 2: Convert to fraction form
    1,014.15/1,399.32 = 660.14/x
  3. Step 3: Cross multiply
    1,014.15x = 1,399.32 × 660.14
  4. Step 4: Simplify right side
    1,014.15x = 923,740.11
  5. Step 5: Solve for x
    x = 923,740.11/1,014.15
  6. Step 6: Final answer
    x = 910.85

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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.