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Finding the Fourth Proportional to 703.70, 970.79 and 408.79

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Solution

The fourth proportional to 703.70, 970.79 and 408.79 is: 563.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    703.70 : 970.79 = 408.79 : x
  2. Step 2: Convert to fraction form
    703.70/970.79 = 408.79/x
  3. Step 3: Cross multiply
    703.70x = 970.79 × 408.79
  4. Step 4: Simplify right side
    703.70x = 396,849.24
  5. Step 5: Solve for x
    x = 396,849.24/703.70
  6. Step 6: Final answer
    x = 563.95

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.