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Finding the Fourth Proportional to 680,468.51, 939,039.11 and 374,538.34

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Solution

The fourth proportional to 680,468.51, 939,039.11 and 374,538.34 is: 516,858.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,468.51 : 939,039.11 = 374,538.34 : x
  2. Step 2: Convert to fraction form
    680,468.51/939,039.11 = 374,538.34/x
  3. Step 3: Cross multiply
    680,468.51x = 939,039.11 × 374,538.34
  4. Step 4: Simplify right side
    680,468.51x = 351,706,145,695.63
  5. Step 5: Solve for x
    x = 351,706,145,695.63/680,468.51
  6. Step 6: Final answer
    x = 516,858.81

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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.