Home / 820,871.20-1,231,306.80-288,215.20

Finding the Fourth Proportional to 820,871.20, 1,231,306.80 and 288,215.20

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Solution

The fourth proportional to 820,871.20, 1,231,306.80 and 288,215.20 is: 432,322.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    820,871.20 : 1,231,306.80 = 288,215.20 : x
  2. Step 2: Convert to fraction form
    820,871.20/1,231,306.80 = 288,215.20/x
  3. Step 3: Cross multiply
    820,871.20x = 1,231,306.80 × 288,215.20
  4. Step 4: Simplify right side
    820,871.20x = 354,881,335,623.36
  5. Step 5: Solve for x
    x = 354,881,335,623.36/820,871.20
  6. Step 6: Final answer
    x = 432,322.80

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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.