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Finding the Fourth Proportional to 680,585.88, 939,192.54 and 378,773.40

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Solution

The fourth proportional to 680,585.88, 939,192.54 and 378,773.40 is: 522,698.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,585.88 : 939,192.54 = 378,773.40 : x
  2. Step 2: Convert to fraction form
    680,585.88/939,192.54 = 378,773.40/x
  3. Step 3: Cross multiply
    680,585.88x = 939,192.54 × 378,773.40
  4. Step 4: Simplify right side
    680,585.88x = 355,741,151,630.44
  5. Step 5: Solve for x
    x = 355,741,151,630.44/680,585.88
  6. Step 6: Final answer
    x = 522,698.40

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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.