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Finding the Fourth Proportional to 640,312.97, 960,434.82 and 324,761.67

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Solution

The fourth proportional to 640,312.97, 960,434.82 and 324,761.67 is: 487,124.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,312.97 : 960,434.82 = 324,761.67 : x
  2. Step 2: Convert to fraction form
    640,312.97/960,434.82 = 324,761.67/x
  3. Step 3: Cross multiply
    640,312.97x = 960,434.82 × 324,761.67
  4. Step 4: Simplify right side
    640,312.97x = 311,912,416,069.35
  5. Step 5: Solve for x
    x = 311,912,416,069.35/640,312.97
  6. Step 6: Final answer
    x = 487,124.94

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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.