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Finding the Fourth Proportional to 621,458.93, 857,679.13 and 379,882.91

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Solution

The fourth proportional to 621,458.93, 857,679.13 and 379,882.91 is: 524,278.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,458.93 : 857,679.13 = 379,882.91 : x
  2. Step 2: Convert to fraction form
    621,458.93/857,679.13 = 379,882.91/x
  3. Step 3: Cross multiply
    621,458.93x = 857,679.13 × 379,882.91
  4. Step 4: Simplify right side
    621,458.93x = 325,817,646,369.72
  5. Step 5: Solve for x
    x = 325,817,646,369.72/621,458.93
  6. Step 6: Final answer
    x = 524,278.64

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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.