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Finding the Fourth Proportional to 680,902.16, 939,810.50 and 394,376

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Solution

The fourth proportional to 680,902.16, 939,810.50 and 394,376 is: 544,334.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,902.16 : 939,810.50 = 394,376 : x
  2. Step 2: Convert to fraction form
    680,902.16/939,810.50 = 394,376/x
  3. Step 3: Cross multiply
    680,902.16x = 939,810.50 × 394,376
  4. Step 4: Simplify right side
    680,902.16x = 370,638,705,748
  5. Step 5: Solve for x
    x = 370,638,705,748/680,902.16
  6. Step 6: Final answer
    x = 544,334.75

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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.