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Finding the Fourth Proportional to 880,411.20, 1,320,616.80 and 820,924.80

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Solution

The fourth proportional to 880,411.20, 1,320,616.80 and 820,924.80 is: 1,231,387.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    880,411.20 : 1,320,616.80 = 820,924.80 : x
  2. Step 2: Convert to fraction form
    880,411.20/1,320,616.80 = 820,924.80/x
  3. Step 3: Cross multiply
    880,411.20x = 1,320,616.80 × 820,924.80
  4. Step 4: Simplify right side
    880,411.20x = 1,084,127,082,416.64
  5. Step 5: Solve for x
    x = 1,084,127,082,416.64/880,411.20
  6. Step 6: Final answer
    x = 1,231,387.20

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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.