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Finding the Fourth Proportional to 639,825.86, 960,329.18 and 324,504.20

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Solution

The fourth proportional to 639,825.86, 960,329.18 and 324,504.20 is: 487,055.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,825.86 : 960,329.18 = 324,504.20 : x
  2. Step 2: Convert to fraction form
    639,825.86/960,329.18 = 324,504.20/x
  3. Step 3: Cross multiply
    639,825.86x = 960,329.18 × 324,504.20
  4. Step 4: Simplify right side
    639,825.86x = 311,630,848,302.17
  5. Step 5: Solve for x
    x = 311,630,848,302.17/639,825.86
  6. Step 6: Final answer
    x = 487,055.73

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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.