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Finding the Fourth Proportional to 680,483.88, 939,006.66 and 394,023.40

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Solution

The fourth proportional to 680,483.88, 939,006.66 and 394,023.40 is: 543,716.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,483.88 : 939,006.66 = 394,023.40 : x
  2. Step 2: Convert to fraction form
    680,483.88/939,006.66 = 394,023.40/x
  3. Step 3: Cross multiply
    680,483.88x = 939,006.66 × 394,023.40
  4. Step 4: Simplify right side
    680,483.88x = 369,990,596,795.84
  5. Step 5: Solve for x
    x = 369,990,596,795.84/680,483.88
  6. Step 6: Final answer
    x = 543,716.92

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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.