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Finding the Fourth Proportional to 679,910.82, 938,299.95 and 374,009.94

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Solution

The fourth proportional to 679,910.82, 938,299.95 and 374,009.94 is: 516,146.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    679,910.82 : 938,299.95 = 374,009.94 : x
  2. Step 2: Convert to fraction form
    679,910.82/938,299.95 = 374,009.94/x
  3. Step 3: Cross multiply
    679,910.82x = 938,299.95 × 374,009.94
  4. Step 4: Simplify right side
    679,910.82x = 350,933,508,001.50
  5. Step 5: Solve for x
    x = 350,933,508,001.50/679,910.82
  6. Step 6: Final answer
    x = 516,146.38

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1.5x scale

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.