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Finding the Fourth Proportional to 709.86, 1,064.93 and 247.77

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Solution

The fourth proportional to 709.86, 1,064.93 and 247.77 is: 371.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    709.86 : 1,064.93 = 247.77 : x
  2. Step 2: Convert to fraction form
    709.86/1,064.93 = 247.77/x
  3. Step 3: Cross multiply
    709.86x = 1,064.93 × 247.77
  4. Step 4: Simplify right side
    709.86x = 263,858.11
  5. Step 5: Solve for x
    x = 263,858.11/709.86
  6. Step 6: Final answer
    x = 371.70

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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.