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Finding the Fourth Proportional to 447,086.40, 670,629.60 and 147,613.20

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Solution

The fourth proportional to 447,086.40, 670,629.60 and 147,613.20 is: 221,419.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    447,086.40 : 670,629.60 = 147,613.20 : x
  2. Step 2: Convert to fraction form
    447,086.40/670,629.60 = 147,613.20/x
  3. Step 3: Cross multiply
    447,086.40x = 670,629.60 × 147,613.20
  4. Step 4: Simplify right side
    447,086.40x = 98,993,781,270.72
  5. Step 5: Solve for x
    x = 98,993,781,270.72/447,086.40
  6. Step 6: Final answer
    x = 221,419.80

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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.