Home / 1,086,640.80-1,629,888.30-287,905.20

Finding the Fourth Proportional to 1,086,640.80, 1,629,888.30 and 287,905.20

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Solution

The fourth proportional to 1,086,640.80, 1,629,888.30 and 287,905.20 is: 431,838.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,086,640.80 : 1,629,888.30 = 287,905.20 : x
  2. Step 2: Convert to fraction form
    1,086,640.80/1,629,888.30 = 287,905.20/x
  3. Step 3: Cross multiply
    1,086,640.80x = 1,629,888.30 × 287,905.20
  4. Step 4: Simplify right side
    1,086,640.80x = 469,253,316,989.16
  5. Step 5: Solve for x
    x = 469,253,316,989.16/1,086,640.80
  6. Step 6: Final answer
    x = 431,838.49

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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.