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Finding the Fourth Proportional to 630,627.40, 944,385.90 and 419,120.20

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Solution

The fourth proportional to 630,627.40, 944,385.90 and 419,120.20 is: 627,646.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,627.40 : 944,385.90 = 419,120.20 : x
  2. Step 2: Convert to fraction form
    630,627.40/944,385.90 = 419,120.20/x
  3. Step 3: Cross multiply
    630,627.40x = 944,385.90 × 419,120.20
  4. Step 4: Simplify right side
    630,627.40x = 395,811,207,285.18
  5. Step 5: Solve for x
    x = 395,811,207,285.18/630,627.40
  6. Step 6: Final answer
    x = 627,646.70

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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.