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Finding the Fourth Proportional to 2,291.91, 3,437.87 and 830.47

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Solution

The fourth proportional to 2,291.91, 3,437.87 and 830.47 is: 1,245.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,291.91 : 3,437.87 = 830.47 : x
  2. Step 2: Convert to fraction form
    2,291.91/3,437.87 = 830.47/x
  3. Step 3: Cross multiply
    2,291.91x = 3,437.87 × 830.47
  4. Step 4: Simplify right side
    2,291.91x = 2,855,047.90
  5. Step 5: Solve for x
    x = 2,855,047.90/2,291.91
  6. Step 6: Final answer
    x = 1,245.71

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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.