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Finding the Fourth Proportional to 709.99, 1,064.72 and 247.64

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Solution

The fourth proportional to 709.99, 1,064.72 and 247.64 is: 371.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    709.99 : 1,064.72 = 247.64 : x
  2. Step 2: Convert to fraction form
    709.99/1,064.72 = 247.64/x
  3. Step 3: Cross multiply
    709.99x = 1,064.72 × 247.64
  4. Step 4: Simplify right side
    709.99x = 263,662.56
  5. Step 5: Solve for x
    x = 263,662.56/709.99
  6. Step 6: Final answer
    x = 371.36

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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.