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Finding the Fourth Proportional to 640,310.72, 960,431.45 and 324,759.42

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Solution

The fourth proportional to 640,310.72, 960,431.45 and 324,759.42 is: 487,121.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,310.72 : 960,431.45 = 324,759.42 : x
  2. Step 2: Convert to fraction form
    640,310.72/960,431.45 = 324,759.42/x
  3. Step 3: Cross multiply
    640,310.72x = 960,431.45 × 324,759.42
  4. Step 4: Simplify right side
    640,310.72x = 311,909,159,027.96
  5. Step 5: Solve for x
    x = 311,909,159,027.96/640,310.72
  6. Step 6: Final answer
    x = 487,121.57

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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.