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Finding the Fourth Proportional to 451,340.49, 672,975.64 and 438,940.20

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Solution

The fourth proportional to 451,340.49, 672,975.64 and 438,940.20 is: 654,486.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    451,340.49 : 672,975.64 = 438,940.20 : x
  2. Step 2: Convert to fraction form
    451,340.49/672,975.64 = 438,940.20/x
  3. Step 3: Cross multiply
    451,340.49x = 672,975.64 × 438,940.20
  4. Step 4: Simplify right side
    451,340.49x = 295,396,062,016.73
  5. Step 5: Solve for x
    x = 295,396,062,016.73/451,340.49
  6. Step 6: Final answer
    x = 654,486.07

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.