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Finding the Fourth Proportional to 654.78, 980.73 and 610.86

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Solution

The fourth proportional to 654.78, 980.73 and 610.86 is: 914.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    654.78 : 980.73 = 610.86 : x
  2. Step 2: Convert to fraction form
    654.78/980.73 = 610.86/x
  3. Step 3: Cross multiply
    654.78x = 980.73 × 610.86
  4. Step 4: Simplify right side
    654.78x = 599,088.73
  5. Step 5: Solve for x
    x = 599,088.73/654.78
  6. Step 6: Final answer
    x = 914.95

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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.