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Finding the Fourth Proportional to 653.84, 980.99 and 403.96

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Solution

The fourth proportional to 653.84, 980.99 and 403.96 is: 606.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    653.84 : 980.99 = 403.96 : x
  2. Step 2: Convert to fraction form
    653.84/980.99 = 403.96/x
  3. Step 3: Cross multiply
    653.84x = 980.99 × 403.96
  4. Step 4: Simplify right side
    653.84x = 396,280.72
  5. Step 5: Solve for x
    x = 396,280.72/653.84
  6. Step 6: Final answer
    x = 606.08

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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.