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Finding the Fourth Proportional to 552,481.19, 761,771.88 and 378,135.47

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Solution

The fourth proportional to 552,481.19, 761,771.88 and 378,135.47 is: 521,380.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    552,481.19 : 761,771.88 = 378,135.47 : x
  2. Step 2: Convert to fraction form
    552,481.19/761,771.88 = 378,135.47/x
  3. Step 3: Cross multiply
    552,481.19x = 761,771.88 × 378,135.47
  4. Step 4: Simplify right side
    552,481.19x = 288,052,967,876.58
  5. Step 5: Solve for x
    x = 288,052,967,876.58/552,481.19
  6. Step 6: Final answer
    x = 521,380.59

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1.5x scale

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.