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Finding the Fourth Proportional to 308,560.40, 462,749.88 and 131,066

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Solution

The fourth proportional to 308,560.40, 462,749.88 and 131,066 is: 196,560.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,560.40 : 462,749.88 = 131,066 : x
  2. Step 2: Convert to fraction form
    308,560.40/462,749.88 = 131,066/x
  3. Step 3: Cross multiply
    308,560.40x = 462,749.88 × 131,066
  4. Step 4: Simplify right side
    308,560.40x = 60,650,775,772.08
  5. Step 5: Solve for x
    x = 60,650,775,772.08/308,560.40
  6. Step 6: Final answer
    x = 196,560.47

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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.