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Finding the Fourth Proportional to 679,200, 937,326.80 and 377,394

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Solution

The fourth proportional to 679,200, 937,326.80 and 377,394 is: 520,820.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    679,200 : 937,326.80 = 377,394 : x
  2. Step 2: Convert to fraction form
    679,200/937,326.80 = 377,394/x
  3. Step 3: Cross multiply
    679,200x = 937,326.80 × 377,394
  4. Step 4: Simplify right side
    679,200x = 353,741,510,359.20
  5. Step 5: Solve for x
    x = 353,741,510,359.20/679,200
  6. Step 6: Final answer
    x = 520,820.83

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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.