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Finding the Fourth Proportional to 654.60, 980.46 and 380.01

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Solution

The fourth proportional to 654.60, 980.46 and 380.01 is: 569.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    654.60 : 980.46 = 380.01 : x
  2. Step 2: Convert to fraction form
    654.60/980.46 = 380.01/x
  3. Step 3: Cross multiply
    654.60x = 980.46 × 380.01
  4. Step 4: Simplify right side
    654.60x = 372,584.60
  5. Step 5: Solve for x
    x = 372,584.60/654.60
  6. Step 6: Final answer
    x = 569.18

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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.