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Finding the Fourth Proportional to 679,963.63, 938,367.31 and 374,047.87

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Solution

The fourth proportional to 679,963.63, 938,367.31 and 374,047.87 is: 516,195.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    679,963.63 : 938,367.31 = 374,047.87 : x
  2. Step 2: Convert to fraction form
    679,963.63/938,367.31 = 374,047.87/x
  3. Step 3: Cross multiply
    679,963.63x = 938,367.31 × 374,047.87
  4. Step 4: Simplify right side
    679,963.63x = 350,994,288,891.29
  5. Step 5: Solve for x
    x = 350,994,288,891.29/679,963.63
  6. Step 6: Final answer
    x = 516,195.68

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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.