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Finding the Fourth Proportional to 426,863.96, 640,321 and 160,626.78

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Solution

The fourth proportional to 426,863.96, 640,321 and 160,626.78 is: 240,949.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,863.96 : 640,321 = 160,626.78 : x
  2. Step 2: Convert to fraction form
    426,863.96/640,321 = 160,626.78/x
  3. Step 3: Cross multiply
    426,863.96x = 640,321 × 160,626.78
  4. Step 4: Simplify right side
    426,863.96x = 102,852,700,396.38
  5. Step 5: Solve for x
    x = 102,852,700,396.38/426,863.96
  6. Step 6: Final answer
    x = 240,949.60

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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.