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Finding the Fourth Proportional to 768,272.80, 1,152,409.20 and 324,983.20

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Solution

The fourth proportional to 768,272.80, 1,152,409.20 and 324,983.20 is: 487,474.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    768,272.80 : 1,152,409.20 = 324,983.20 : x
  2. Step 2: Convert to fraction form
    768,272.80/1,152,409.20 = 324,983.20/x
  3. Step 3: Cross multiply
    768,272.80x = 1,152,409.20 × 324,983.20
  4. Step 4: Simplify right side
    768,272.80x = 374,513,629,525.44
  5. Step 5: Solve for x
    x = 374,513,629,525.44/768,272.80
  6. Step 6: Final answer
    x = 487,474.80

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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.