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Finding the Fourth Proportional to 415,099.40, 622,649.10 and 407,226.20

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Solution

The fourth proportional to 415,099.40, 622,649.10 and 407,226.20 is: 610,839.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    415,099.40 : 622,649.10 = 407,226.20 : x
  2. Step 2: Convert to fraction form
    415,099.40/622,649.10 = 407,226.20/x
  3. Step 3: Cross multiply
    415,099.40x = 622,649.10 × 407,226.20
  4. Step 4: Simplify right side
    415,099.40x = 253,559,026,926.42
  5. Step 5: Solve for x
    x = 253,559,026,926.42/415,099.40
  6. Step 6: Final answer
    x = 610,839.30

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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.