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Finding the Fourth Proportional to 821,764.80, 1,232,647.20 and 260,843.20

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Solution

The fourth proportional to 821,764.80, 1,232,647.20 and 260,843.20 is: 391,264.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    821,764.80 : 1,232,647.20 = 260,843.20 : x
  2. Step 2: Convert to fraction form
    821,764.80/1,232,647.20 = 260,843.20/x
  3. Step 3: Cross multiply
    821,764.80x = 1,232,647.20 × 260,843.20
  4. Step 4: Simplify right side
    821,764.80x = 321,527,640,119.04
  5. Step 5: Solve for x
    x = 321,527,640,119.04/821,764.80
  6. Step 6: Final answer
    x = 391,264.80

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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.