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Finding the Fourth Proportional to 636,405, 878,216.42 and 349,923.08

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Solution

The fourth proportional to 636,405, 878,216.42 and 349,923.08 is: 482,881.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,405 : 878,216.42 = 349,923.08 : x
  2. Step 2: Convert to fraction form
    636,405/878,216.42 = 349,923.08/x
  3. Step 3: Cross multiply
    636,405x = 878,216.42 × 349,923.08
  4. Step 4: Simplify right side
    636,405x = 307,308,194,592.97
  5. Step 5: Solve for x
    x = 307,308,194,592.97/636,405
  6. Step 6: Final answer
    x = 482,881.49

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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.