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Finding the Fourth Proportional to 543,338.20, 815,007.30 and 188,388.10

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Solution

The fourth proportional to 543,338.20, 815,007.30 and 188,388.10 is: 282,582.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,338.20 : 815,007.30 = 188,388.10 : x
  2. Step 2: Convert to fraction form
    543,338.20/815,007.30 = 188,388.10/x
  3. Step 3: Cross multiply
    543,338.20x = 815,007.30 × 188,388.10
  4. Step 4: Simplify right side
    543,338.20x = 153,537,676,733.13
  5. Step 5: Solve for x
    x = 153,537,676,733.13/543,338.20
  6. Step 6: Final answer
    x = 282,582.15

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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.