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Finding the Fourth Proportional to 426,560.39, 640,005.15 and 305,118.17

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Solution

The fourth proportional to 426,560.39, 640,005.15 and 305,118.17 is: 457,794.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,560.39 : 640,005.15 = 305,118.17 : x
  2. Step 2: Convert to fraction form
    426,560.39/640,005.15 = 305,118.17/x
  3. Step 3: Cross multiply
    426,560.39x = 640,005.15 × 305,118.17
  4. Step 4: Simplify right side
    426,560.39x = 195,277,200,158.58
  5. Step 5: Solve for x
    x = 195,277,200,158.58/426,560.39
  6. Step 6: Final answer
    x = 457,794.97

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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.