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Finding the Fourth Proportional to 378,485.49, 567,780.49 and 138,567.95

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Solution

The fourth proportional to 378,485.49, 567,780.49 and 138,567.95 is: 207,871.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,485.49 : 567,780.49 = 138,567.95 : x
  2. Step 2: Convert to fraction form
    378,485.49/567,780.49 = 138,567.95/x
  3. Step 3: Cross multiply
    378,485.49x = 567,780.49 × 138,567.95
  4. Step 4: Simplify right side
    378,485.49x = 78,676,177,233.34
  5. Step 5: Solve for x
    x = 78,676,177,233.34/378,485.49
  6. Step 6: Final answer
    x = 207,871.05

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.