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Finding the Fourth Proportional to 1,191.32, 1,786.36 and 497.86

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Solution

The fourth proportional to 1,191.32, 1,786.36 and 497.86 is: 746.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,191.32 : 1,786.36 = 497.86 : x
  2. Step 2: Convert to fraction form
    1,191.32/1,786.36 = 497.86/x
  3. Step 3: Cross multiply
    1,191.32x = 1,786.36 × 497.86
  4. Step 4: Simplify right side
    1,191.32x = 889,354.70
  5. Step 5: Solve for x
    x = 889,354.70/1,191.32
  6. Step 6: Final answer
    x = 746.53

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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.