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Finding the Fourth Proportional to 680,756.78, 939,436.44 and 374,826.80

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Solution

The fourth proportional to 680,756.78, 939,436.44 and 374,826.80 is: 517,256.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,756.78 : 939,436.44 = 374,826.80 : x
  2. Step 2: Convert to fraction form
    680,756.78/939,436.44 = 374,826.80/x
  3. Step 3: Cross multiply
    680,756.78x = 939,436.44 × 374,826.80
  4. Step 4: Simplify right side
    680,756.78x = 352,125,954,608.59
  5. Step 5: Solve for x
    x = 352,125,954,608.59/680,756.78
  6. Step 6: Final answer
    x = 517,256.63

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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.