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Finding the Fourth Proportional to 487,685.96, 672,960.98 and 303,907.49

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Solution

The fourth proportional to 487,685.96, 672,960.98 and 303,907.49 is: 419,363.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,685.96 : 672,960.98 = 303,907.49 : x
  2. Step 2: Convert to fraction form
    487,685.96/672,960.98 = 303,907.49/x
  3. Step 3: Cross multiply
    487,685.96x = 672,960.98 × 303,907.49
  4. Step 4: Simplify right side
    487,685.96x = 204,517,879,694.70
  5. Step 5: Solve for x
    x = 204,517,879,694.70/487,685.96
  6. Step 6: Final answer
    x = 419,363.89

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.