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Finding the Fourth Proportional to 679,912.82, 938,302.71 and 374,011.94

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Solution

The fourth proportional to 679,912.82, 938,302.71 and 374,011.94 is: 516,149.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    679,912.82 : 938,302.71 = 374,011.94 : x
  2. Step 2: Convert to fraction form
    679,912.82/938,302.71 = 374,011.94/x
  3. Step 3: Cross multiply
    679,912.82x = 938,302.71 × 374,011.94
  4. Step 4: Simplify right side
    679,912.82x = 350,936,416,874.36
  5. Step 5: Solve for x
    x = 350,936,416,874.36/679,912.82
  6. Step 6: Final answer
    x = 516,149.14

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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.