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Finding the Fourth Proportional to 680,711.36, 939,344.88 and 374,728.16

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Solution

The fourth proportional to 680,711.36, 939,344.88 and 374,728.16 is: 517,104.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,711.36 : 939,344.88 = 374,728.16 : x
  2. Step 2: Convert to fraction form
    680,711.36/939,344.88 = 374,728.16/x
  3. Step 3: Cross multiply
    680,711.36x = 939,344.88 × 374,728.16
  4. Step 4: Simplify right side
    680,711.36x = 351,998,978,487.82
  5. Step 5: Solve for x
    x = 351,998,978,487.82/680,711.36
  6. Step 6: Final answer
    x = 517,104.60

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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.