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Finding the Fourth Proportional to 680,889.16, 939,792.56 and 394,363

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Solution

The fourth proportional to 680,889.16, 939,792.56 and 394,363 is: 544,316.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,889.16 : 939,792.56 = 394,363 : x
  2. Step 2: Convert to fraction form
    680,889.16/939,792.56 = 394,363/x
  3. Step 3: Cross multiply
    680,889.16x = 939,792.56 × 394,363
  4. Step 4: Simplify right side
    680,889.16x = 370,619,413,339.28
  5. Step 5: Solve for x
    x = 370,619,413,339.28/680,889.16
  6. Step 6: Final answer
    x = 544,316.81

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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.