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Finding the Fourth Proportional to 653.40, 980.01 and 306.63

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Solution

The fourth proportional to 653.40, 980.01 and 306.63 is: 459.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    653.40 : 980.01 = 306.63 : x
  2. Step 2: Convert to fraction form
    653.40/980.01 = 306.63/x
  3. Step 3: Cross multiply
    653.40x = 980.01 × 306.63
  4. Step 4: Simplify right side
    653.40x = 300,500.47
  5. Step 5: Solve for x
    x = 300,500.47/653.40
  6. Step 6: Final answer
    x = 459.90

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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.