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Finding the Fourth Proportional to 636,361.80, 878,195.91 and 345,992.90

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Solution

The fourth proportional to 636,361.80, 878,195.91 and 345,992.90 is: 477,479.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,361.80 : 878,195.91 = 345,992.90 : x
  2. Step 2: Convert to fraction form
    636,361.80/878,195.91 = 345,992.90/x
  3. Step 3: Cross multiply
    636,361.80x = 878,195.91 × 345,992.90
  4. Step 4: Simplify right side
    636,361.80x = 303,849,545,278.06
  5. Step 5: Solve for x
    x = 303,849,545,278.06/636,361.80
  6. Step 6: Final answer
    x = 477,479.23

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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.