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Finding the Fourth Proportional to 681,771.84, 940,877.28 and 379,968

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Solution

The fourth proportional to 681,771.84, 940,877.28 and 379,968 is: 524,373.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    681,771.84 : 940,877.28 = 379,968 : x
  2. Step 2: Convert to fraction form
    681,771.84/940,877.28 = 379,968/x
  3. Step 3: Cross multiply
    681,771.84x = 940,877.28 × 379,968
  4. Step 4: Simplify right side
    681,771.84x = 357,503,258,327.04
  5. Step 5: Solve for x
    x = 357,503,258,327.04/681,771.84
  6. Step 6: Final answer
    x = 524,373.75

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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.