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Finding the Fourth Proportional to 5,287.15, 7,931.13 and 1,589.11

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Solution

The fourth proportional to 5,287.15, 7,931.13 and 1,589.11 is: 2,383.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,287.15 : 7,931.13 = 1,589.11 : x
  2. Step 2: Convert to fraction form
    5,287.15/7,931.13 = 1,589.11/x
  3. Step 3: Cross multiply
    5,287.15x = 7,931.13 × 1,589.11
  4. Step 4: Simplify right side
    5,287.15x = 12,603,437.99
  5. Step 5: Solve for x
    x = 12,603,437.99/5,287.15
  6. Step 6: Final answer
    x = 2,383.79

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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.