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Finding the Fourth Proportional to 680,572.76, 939,190.40 and 378,838.04

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Solution

The fourth proportional to 680,572.76, 939,190.40 and 378,838.04 is: 522,796.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,572.76 : 939,190.40 = 378,838.04 : x
  2. Step 2: Convert to fraction form
    680,572.76/939,190.40 = 378,838.04/x
  3. Step 3: Cross multiply
    680,572.76x = 939,190.40 × 378,838.04
  4. Step 4: Simplify right side
    680,572.76x = 355,801,050,322.82
  5. Step 5: Solve for x
    x = 355,801,050,322.82/680,572.76
  6. Step 6: Final answer
    x = 522,796.49

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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.