Home / 393,007.40-589,511.10-143,786.60

Finding the Fourth Proportional to 393,007.40, 589,511.10 and 143,786.60

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Solution

The fourth proportional to 393,007.40, 589,511.10 and 143,786.60 is: 215,679.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,007.40 : 589,511.10 = 143,786.60 : x
  2. Step 2: Convert to fraction form
    393,007.40/589,511.10 = 143,786.60/x
  3. Step 3: Cross multiply
    393,007.40x = 589,511.10 × 143,786.60
  4. Step 4: Simplify right side
    393,007.40x = 84,763,796,731.26
  5. Step 5: Solve for x
    x = 84,763,796,731.26/393,007.40
  6. Step 6: Final answer
    x = 215,679.90

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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.