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Finding the Fourth Proportional to 547,740.69, 755,752.56 and 318,161.58

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Solution

The fourth proportional to 547,740.69, 755,752.56 and 318,161.58 is: 438,987.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    547,740.69 : 755,752.56 = 318,161.58 : x
  2. Step 2: Convert to fraction form
    547,740.69/755,752.56 = 318,161.58/x
  3. Step 3: Cross multiply
    547,740.69x = 755,752.56 × 318,161.58
  4. Step 4: Simplify right side
    547,740.69x = 240,451,428,578.65
  5. Step 5: Solve for x
    x = 240,451,428,578.65/547,740.69
  6. Step 6: Final answer
    x = 438,987.71

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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.