Home / 642,133.82-886,151.18-387,435.80

Finding the Fourth Proportional to 642,133.82, 886,151.18 and 387,435.80

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Solution

The fourth proportional to 642,133.82, 886,151.18 and 387,435.80 is: 534,665.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,133.82 : 886,151.18 = 387,435.80 : x
  2. Step 2: Convert to fraction form
    642,133.82/886,151.18 = 387,435.80/x
  3. Step 3: Cross multiply
    642,133.82x = 886,151.18 × 387,435.80
  4. Step 4: Simplify right side
    642,133.82x = 343,326,694,528.21
  5. Step 5: Solve for x
    x = 343,326,694,528.21/642,133.82
  6. Step 6: Final answer
    x = 534,665.33

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.