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Finding the Fourth Proportional to 621,521.69, 857,691.32 and 349,589.77

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Solution

The fourth proportional to 621,521.69, 857,691.32 and 349,589.77 is: 482,429.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,521.69 : 857,691.32 = 349,589.77 : x
  2. Step 2: Convert to fraction form
    621,521.69/857,691.32 = 349,589.77/x
  3. Step 3: Cross multiply
    621,521.69x = 857,691.32 × 349,589.77
  4. Step 4: Simplify right side
    621,521.69x = 299,840,107,397.62
  5. Step 5: Solve for x
    x = 299,840,107,397.62/621,521.69
  6. Step 6: Final answer
    x = 482,429.03

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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.