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Finding the Fourth Proportional to 720,571.53, 994,388.77 and 393,885.84

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Solution

The fourth proportional to 720,571.53, 994,388.77 and 393,885.84 is: 543,562.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,571.53 : 994,388.77 = 393,885.84 : x
  2. Step 2: Convert to fraction form
    720,571.53/994,388.77 = 393,885.84/x
  3. Step 3: Cross multiply
    720,571.53x = 994,388.77 × 393,885.84
  4. Step 4: Simplify right side
    720,571.53x = 391,675,655,958.02
  5. Step 5: Solve for x
    x = 391,675,655,958.02/720,571.53
  6. Step 6: Final answer
    x = 543,562.49

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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.