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Finding the Fourth Proportional to 680,081.55, 938,474.96 and 378,256.11

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Solution

The fourth proportional to 680,081.55, 938,474.96 and 378,256.11 is: 521,972.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,081.55 : 938,474.96 = 378,256.11 : x
  2. Step 2: Convert to fraction form
    680,081.55/938,474.96 = 378,256.11/x
  3. Step 3: Cross multiply
    680,081.55x = 938,474.96 × 378,256.11
  4. Step 4: Simplify right side
    680,081.55x = 354,983,885,810.73
  5. Step 5: Solve for x
    x = 354,983,885,810.73/680,081.55
  6. Step 6: Final answer
    x = 521,972.53

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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.