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Finding the Fourth Proportional to 426,561.39, 640,006.65 and 305,119.17

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Solution

The fourth proportional to 426,561.39, 640,006.65 and 305,119.17 is: 457,796.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,561.39 : 640,006.65 = 305,119.17 : x
  2. Step 2: Convert to fraction form
    426,561.39/640,006.65 = 305,119.17/x
  3. Step 3: Cross multiply
    426,561.39x = 640,006.65 × 305,119.17
  4. Step 4: Simplify right side
    426,561.39x = 195,278,297,842.48
  5. Step 5: Solve for x
    x = 195,278,297,842.48/426,561.39
  6. Step 6: Final answer
    x = 457,796.47

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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.