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Finding the Fourth Proportional to 621,098.78, 857,117.73 and 349,168.91

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Solution

The fourth proportional to 621,098.78, 857,117.73 and 349,168.91 is: 481,853.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,098.78 : 857,117.73 = 349,168.91 : x
  2. Step 2: Convert to fraction form
    621,098.78/857,117.73 = 349,168.91/x
  3. Step 3: Cross multiply
    621,098.78x = 857,117.73 × 349,168.91
  4. Step 4: Simplify right side
    621,098.78x = 299,278,863,525.77
  5. Step 5: Solve for x
    x = 299,278,863,525.77/621,098.78
  6. Step 6: Final answer
    x = 481,853.89

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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.