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Finding the Fourth Proportional to 415,099.40, 622,649.10 and 378,357.80

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Solution

The fourth proportional to 415,099.40, 622,649.10 and 378,357.80 is: 567,536.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    415,099.40 : 622,649.10 = 378,357.80 : x
  2. Step 2: Convert to fraction form
    415,099.40/622,649.10 = 378,357.80/x
  3. Step 3: Cross multiply
    415,099.40x = 622,649.10 × 378,357.80
  4. Step 4: Simplify right side
    415,099.40x = 235,584,143,647.98
  5. Step 5: Solve for x
    x = 235,584,143,647.98/415,099.40
  6. Step 6: Final answer
    x = 567,536.70

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Similar ratio
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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.