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Finding the Fourth Proportional to 630,629.40, 944,388.90 and 419,122.20

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Solution

The fourth proportional to 630,629.40, 944,388.90 and 419,122.20 is: 627,649.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,629.40 : 944,388.90 = 419,122.20 : x
  2. Step 2: Convert to fraction form
    630,629.40/944,388.90 = 419,122.20/x
  3. Step 3: Cross multiply
    630,629.40x = 944,388.90 × 419,122.20
  4. Step 4: Simplify right side
    630,629.40x = 395,814,353,423.58
  5. Step 5: Solve for x
    x = 395,814,353,423.58/630,629.40
  6. Step 6: Final answer
    x = 627,649.70

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Double scale
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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.