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Finding the Fourth Proportional to 679,645.50, 937,911.87 and 377,839.50

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Solution

The fourth proportional to 679,645.50, 937,911.87 and 377,839.50 is: 521,419.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    679,645.50 : 937,911.87 = 377,839.50 : x
  2. Step 2: Convert to fraction form
    679,645.50/937,911.87 = 377,839.50/x
  3. Step 3: Cross multiply
    679,645.50x = 937,911.87 × 377,839.50
  4. Step 4: Simplify right side
    679,645.50x = 354,380,152,004.87
  5. Step 5: Solve for x
    x = 354,380,152,004.87/679,645.50
  6. Step 6: Final answer
    x = 521,419.11

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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.