Home / 820,869.60-1,231,304.40-288,991.20

Finding the Fourth Proportional to 820,869.60, 1,231,304.40 and 288,991.20

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Solution

The fourth proportional to 820,869.60, 1,231,304.40 and 288,991.20 is: 433,486.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    820,869.60 : 1,231,304.40 = 288,991.20 : x
  2. Step 2: Convert to fraction form
    820,869.60/1,231,304.40 = 288,991.20/x
  3. Step 3: Cross multiply
    820,869.60x = 1,231,304.40 × 288,991.20
  4. Step 4: Simplify right side
    820,869.60x = 355,836,136,121.28
  5. Step 5: Solve for x
    x = 355,836,136,121.28/820,869.60
  6. Step 6: Final answer
    x = 433,486.80

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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.