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Finding the Fourth Proportional to 680,862.66, 939,448.08 and 394,365.66

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Solution

The fourth proportional to 680,862.66, 939,448.08 and 394,365.66 is: 544,142.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,862.66 : 939,448.08 = 394,365.66 : x
  2. Step 2: Convert to fraction form
    680,862.66/939,448.08 = 394,365.66/x
  3. Step 3: Cross multiply
    680,862.66x = 939,448.08 × 394,365.66
  4. Step 4: Simplify right side
    680,862.66x = 370,486,062,104.93
  5. Step 5: Solve for x
    x = 370,486,062,104.93/680,862.66
  6. Step 6: Final answer
    x = 544,142.14

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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.