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Finding the Fourth Proportional to 704.21, 970.79 and 493.74

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Solution

The fourth proportional to 704.21, 970.79 and 493.74 is: 680.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    704.21 : 970.79 = 493.74 : x
  2. Step 2: Convert to fraction form
    704.21/970.79 = 493.74/x
  3. Step 3: Cross multiply
    704.21x = 970.79 × 493.74
  4. Step 4: Simplify right side
    704.21x = 479,315.39
  5. Step 5: Solve for x
    x = 479,315.39/704.21
  6. Step 6: Final answer
    x = 680.65

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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.