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Finding the Fourth Proportional to 388,878.69, 585,418.92 and 349,774.11

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Solution

The fourth proportional to 388,878.69, 585,418.92 and 349,774.11 is: 526,550.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,878.69 : 585,418.92 = 349,774.11 : x
  2. Step 2: Convert to fraction form
    388,878.69/585,418.92 = 349,774.11/x
  3. Step 3: Cross multiply
    388,878.69x = 585,418.92 × 349,774.11
  4. Step 4: Simplify right side
    388,878.69x = 204,764,381,720.16
  5. Step 5: Solve for x
    x = 204,764,381,720.16/388,878.69
  6. Step 6: Final answer
    x = 526,550.79

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.