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Finding the Fourth Proportional to 680,012.83, 938,388.05 and 374,069.80

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Solution

The fourth proportional to 680,012.83, 938,388.05 and 374,069.80 is: 516,200.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,012.83 : 938,388.05 = 374,069.80 : x
  2. Step 2: Convert to fraction form
    680,012.83/938,388.05 = 374,069.80/x
  3. Step 3: Cross multiply
    680,012.83x = 938,388.05 × 374,069.80
  4. Step 4: Simplify right side
    680,012.83x = 351,022,632,294.05
  5. Step 5: Solve for x
    x = 351,022,632,294.05/680,012.83
  6. Step 6: Final answer
    x = 516,200.02

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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.