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Finding the Fourth Proportional to 426,309.60, 639,464.46 and 216,007.68

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Solution

The fourth proportional to 426,309.60, 639,464.46 and 216,007.68 is: 324,011.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,309.60 : 639,464.46 = 216,007.68 : x
  2. Step 2: Convert to fraction form
    426,309.60/639,464.46 = 216,007.68/x
  3. Step 3: Cross multiply
    426,309.60x = 639,464.46 × 216,007.68
  4. Step 4: Simplify right side
    426,309.60x = 138,129,234,447.05
  5. Step 5: Solve for x
    x = 138,129,234,447.05/426,309.60
  6. Step 6: Final answer
    x = 324,011.55

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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.