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Finding the Fourth Proportional to 630,979.40, 944,913.90 and 419,472.20

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Solution

The fourth proportional to 630,979.40, 944,913.90 and 419,472.20 is: 628,174.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,979.40 : 944,913.90 = 419,472.20 : x
  2. Step 2: Convert to fraction form
    630,979.40/944,913.90 = 419,472.20/x
  3. Step 3: Cross multiply
    630,979.40x = 944,913.90 × 419,472.20
  4. Step 4: Simplify right side
    630,979.40x = 396,365,112,443.58
  5. Step 5: Solve for x
    x = 396,365,112,443.58/630,979.40
  6. Step 6: Final answer
    x = 628,174.41

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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.