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Finding the Fourth Proportional to 418,320.80, 628,793.40 and 410,447.60

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Solution

The fourth proportional to 418,320.80, 628,793.40 and 410,447.60 is: 616,958.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,320.80 : 628,793.40 = 410,447.60 : x
  2. Step 2: Convert to fraction form
    418,320.80/628,793.40 = 410,447.60/x
  3. Step 3: Cross multiply
    418,320.80x = 628,793.40 × 410,447.60
  4. Step 4: Simplify right side
    418,320.80x = 258,086,741,925.84
  5. Step 5: Solve for x
    x = 258,086,741,925.84/418,320.80
  6. Step 6: Final answer
    x = 616,958.90

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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.