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Finding the Fourth Proportional to 680,729.69, 939,399.39 and 374,799.75

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Solution

The fourth proportional to 680,729.69, 939,399.39 and 374,799.75 is: 517,219.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,729.69 : 939,399.39 = 374,799.75 : x
  2. Step 2: Convert to fraction form
    680,729.69/939,399.39 = 374,799.75/x
  3. Step 3: Cross multiply
    680,729.69x = 939,399.39 × 374,799.75
  4. Step 4: Simplify right side
    680,729.69x = 352,086,656,522.15
  5. Step 5: Solve for x
    x = 352,086,656,522.15/680,729.69
  6. Step 6: Final answer
    x = 517,219.48

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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.