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Finding the Fourth Proportional to 680,882.16, 939,782.88 and 394,356

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Solution

The fourth proportional to 680,882.16, 939,782.88 and 394,356 is: 544,307.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,882.16 : 939,782.88 = 394,356 : x
  2. Step 2: Convert to fraction form
    680,882.16/939,782.88 = 394,356/x
  3. Step 3: Cross multiply
    680,882.16x = 939,782.88 × 394,356
  4. Step 4: Simplify right side
    680,882.16x = 370,609,017,425.28
  5. Step 5: Solve for x
    x = 370,609,017,425.28/680,882.16
  6. Step 6: Final answer
    x = 544,307.13

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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.