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Finding the Fourth Proportional to 653.18, 979.77 and 268.70

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Solution

The fourth proportional to 653.18, 979.77 and 268.70 is: 403.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    653.18 : 979.77 = 268.70 : x
  2. Step 2: Convert to fraction form
    653.18/979.77 = 268.70/x
  3. Step 3: Cross multiply
    653.18x = 979.77 × 268.70
  4. Step 4: Simplify right side
    653.18x = 263,262.86
  5. Step 5: Solve for x
    x = 263,262.86/653.18
  6. Step 6: Final answer
    x = 403.05

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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.