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Finding the Fourth Proportional to 403,766.80, 605,650.20 and 395,472.40

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Solution

The fourth proportional to 403,766.80, 605,650.20 and 395,472.40 is: 593,208.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,766.80 : 605,650.20 = 395,472.40 : x
  2. Step 2: Convert to fraction form
    403,766.80/605,650.20 = 395,472.40/x
  3. Step 3: Cross multiply
    403,766.80x = 605,650.20 × 395,472.40
  4. Step 4: Simplify right side
    403,766.80x = 239,517,938,154.48
  5. Step 5: Solve for x
    x = 239,517,938,154.48/403,766.80
  6. Step 6: Final answer
    x = 593,208.60

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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.