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Finding the Fourth Proportional to 714,735.55, 986,367.23 and 428,249.48

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Solution

The fourth proportional to 714,735.55, 986,367.23 and 428,249.48 is: 591,003.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    714,735.55 : 986,367.23 = 428,249.48 : x
  2. Step 2: Convert to fraction form
    714,735.55/986,367.23 = 428,249.48/x
  3. Step 3: Cross multiply
    714,735.55x = 986,367.23 × 428,249.48
  4. Step 4: Simplify right side
    714,735.55x = 422,411,253,336.54
  5. Step 5: Solve for x
    x = 422,411,253,336.54/714,735.55
  6. Step 6: Final answer
    x = 591,003.56

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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.