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Finding the Fourth Proportional to 426,771.02, 640,293.28 and 298,820.58

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Solution

The fourth proportional to 426,771.02, 640,293.28 and 298,820.58 is: 448,326.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,771.02 : 640,293.28 = 298,820.58 : x
  2. Step 2: Convert to fraction form
    426,771.02/640,293.28 = 298,820.58/x
  3. Step 3: Cross multiply
    426,771.02x = 640,293.28 × 298,820.58
  4. Step 4: Simplify right side
    426,771.02x = 191,332,809,299.70
  5. Step 5: Solve for x
    x = 191,332,809,299.70/426,771.02
  6. Step 6: Final answer
    x = 448,326.62

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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.