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Finding the Fourth Proportional to 680,760.78, 939,441.96 and 374,830.80

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Solution

The fourth proportional to 680,760.78, 939,441.96 and 374,830.80 is: 517,262.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,760.78 : 939,441.96 = 374,830.80 : x
  2. Step 2: Convert to fraction form
    680,760.78/939,441.96 = 374,830.80/x
  3. Step 3: Cross multiply
    680,760.78x = 939,441.96 × 374,830.80
  4. Step 4: Simplify right side
    680,760.78x = 352,131,781,420.37
  5. Step 5: Solve for x
    x = 352,131,781,420.37/680,760.78
  6. Step 6: Final answer
    x = 517,262.15

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1.5x scale

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.