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Finding the Fourth Proportional to 415,230.40, 622,845.60 and 407,357.20

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Solution

The fourth proportional to 415,230.40, 622,845.60 and 407,357.20 is: 611,035.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    415,230.40 : 622,845.60 = 407,357.20 : x
  2. Step 2: Convert to fraction form
    415,230.40/622,845.60 = 407,357.20/x
  3. Step 3: Cross multiply
    415,230.40x = 622,845.60 × 407,357.20
  4. Step 4: Simplify right side
    415,230.40x = 253,720,639,648.32
  5. Step 5: Solve for x
    x = 253,720,639,648.32/415,230.40
  6. Step 6: Final answer
    x = 611,035.80

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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.