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Finding the Fourth Proportional to 680,074.85, 938,503.35 and 374,144.69

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Solution

The fourth proportional to 680,074.85, 938,503.35 and 374,144.69 is: 516,319.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,074.85 : 938,503.35 = 374,144.69 : x
  2. Step 2: Convert to fraction form
    680,074.85/938,503.35 = 374,144.69/x
  3. Step 3: Cross multiply
    680,074.85x = 938,503.35 × 374,144.69
  4. Step 4: Simplify right side
    680,074.85x = 351,136,047,295.97
  5. Step 5: Solve for x
    x = 351,136,047,295.97/680,074.85
  6. Step 6: Final answer
    x = 516,319.71

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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.