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Finding the Fourth Proportional to 398,950.80, 598,426.20 and 188,998.80

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Solution

The fourth proportional to 398,950.80, 598,426.20 and 188,998.80 is: 283,498.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,950.80 : 598,426.20 = 188,998.80 : x
  2. Step 2: Convert to fraction form
    398,950.80/598,426.20 = 188,998.80/x
  3. Step 3: Cross multiply
    398,950.80x = 598,426.20 × 188,998.80
  4. Step 4: Simplify right side
    398,950.80x = 113,101,833,688.56
  5. Step 5: Solve for x
    x = 113,101,833,688.56/398,950.80
  6. Step 6: Final answer
    x = 283,498.20

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1.5x scale

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.