Home / 285,390.50-393,841.78-172,191.38

Finding the Fourth Proportional to 285,390.50, 393,841.78 and 172,191.38

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Solution

The fourth proportional to 285,390.50, 393,841.78 and 172,191.38 is: 237,625.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,390.50 : 393,841.78 = 172,191.38 : x
  2. Step 2: Convert to fraction form
    285,390.50/393,841.78 = 172,191.38/x
  3. Step 3: Cross multiply
    285,390.50x = 393,841.78 × 172,191.38
  4. Step 4: Simplify right side
    285,390.50x = 67,816,157,200.17
  5. Step 5: Solve for x
    x = 67,816,157,200.17/285,390.50
  6. Step 6: Final answer
    x = 237,625.84

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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.