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Finding the Fourth Proportional to 880,415.20, 1,320,622.80 and 820,928.80

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Solution

The fourth proportional to 880,415.20, 1,320,622.80 and 820,928.80 is: 1,231,393.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    880,415.20 : 1,320,622.80 = 820,928.80 : x
  2. Step 2: Convert to fraction form
    880,415.20/1,320,622.80 = 820,928.80/x
  3. Step 3: Cross multiply
    880,415.20x = 1,320,622.80 × 820,928.80
  4. Step 4: Simplify right side
    880,415.20x = 1,084,137,290,456.64
  5. Step 5: Solve for x
    x = 1,084,137,290,456.64/880,415.20
  6. Step 6: Final answer
    x = 1,231,393.20

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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.