Home / 1,231,287.80-1,846,989.30-389,905.40

Finding the Fourth Proportional to 1,231,287.80, 1,846,989.30 and 389,905.40

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Solution

The fourth proportional to 1,231,287.80, 1,846,989.30 and 389,905.40 is: 584,876.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,231,287.80 : 1,846,989.30 = 389,905.40 : x
  2. Step 2: Convert to fraction form
    1,231,287.80/1,846,989.30 = 389,905.40/x
  3. Step 3: Cross multiply
    1,231,287.80x = 1,846,989.30 × 389,905.40
  4. Step 4: Simplify right side
    1,231,287.80x = 720,151,101,812.22
  5. Step 5: Solve for x
    x = 720,151,101,812.22/1,231,287.80
  6. Step 6: Final answer
    x = 584,876.34

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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.