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Finding the Fourth Proportional to 640,409.76, 960,592.77 and 303,611.76

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Solution

The fourth proportional to 640,409.76, 960,592.77 and 303,611.76 is: 455,407.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,409.76 : 960,592.77 = 303,611.76 : x
  2. Step 2: Convert to fraction form
    640,409.76/960,592.77 = 303,611.76/x
  3. Step 3: Cross multiply
    640,409.76x = 960,592.77 × 303,611.76
  4. Step 4: Simplify right side
    640,409.76x = 291,647,261,542.98
  5. Step 5: Solve for x
    x = 291,647,261,542.98/640,409.76
  6. Step 6: Final answer
    x = 455,407.27

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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.