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Finding the Fourth Proportional to 415,010.20, 622,515.30 and 408,789.40

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Solution

The fourth proportional to 415,010.20, 622,515.30 and 408,789.40 is: 613,184.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    415,010.20 : 622,515.30 = 408,789.40 : x
  2. Step 2: Convert to fraction form
    415,010.20/622,515.30 = 408,789.40/x
  3. Step 3: Cross multiply
    415,010.20x = 622,515.30 × 408,789.40
  4. Step 4: Simplify right side
    415,010.20x = 254,477,655,977.82
  5. Step 5: Solve for x
    x = 254,477,655,977.82/415,010.20
  6. Step 6: Final answer
    x = 613,184.10

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1.5x scale

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.