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Finding the Fourth Proportional to 640,064,138.40, 960,096,207.60 and 629,860,471.20

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Solution

The fourth proportional to 640,064,138.40, 960,096,207.60 and 629,860,471.20 is: 944,790,706.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,064,138.40 : 960,096,207.60 = 629,860,471.20 : x
  2. Step 2: Convert to fraction form
    640,064,138.40/960,096,207.60 = 629,860,471.20/x
  3. Step 3: Cross multiply
    640,064,138.40x = 960,096,207.60 × 629,860,471.20
  4. Step 4: Simplify right side
    640,064,138.40x = 604,726,649,716,269,056
  5. Step 5: Solve for x
    x = 604,726,649,716,269,056/640,064,138.40
  6. Step 6: Final answer
    x = 944,790,706.80

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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.