Home / 328,998.20-493,727.70-142,143.80

Finding the Fourth Proportional to 328,998.20, 493,727.70 and 142,143.80

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Solution

The fourth proportional to 328,998.20, 493,727.70 and 142,143.80 is: 213,315.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,998.20 : 493,727.70 = 142,143.80 : x
  2. Step 2: Convert to fraction form
    328,998.20/493,727.70 = 142,143.80/x
  3. Step 3: Cross multiply
    328,998.20x = 493,727.70 × 142,143.80
  4. Step 4: Simplify right side
    328,998.20x = 70,180,331,443.26
  5. Step 5: Solve for x
    x = 70,180,331,443.26/328,998.20
  6. Step 6: Final answer
    x = 213,315.24

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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.