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Finding the Fourth Proportional to 720,247.97, 993,940.16 and 397,955.78

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Solution

The fourth proportional to 720,247.97, 993,940.16 and 397,955.78 is: 549,177.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,247.97 : 993,940.16 = 397,955.78 : x
  2. Step 2: Convert to fraction form
    720,247.97/993,940.16 = 397,955.78/x
  3. Step 3: Cross multiply
    720,247.97x = 993,940.16 × 397,955.78
  4. Step 4: Simplify right side
    720,247.97x = 395,544,228,413.92
  5. Step 5: Solve for x
    x = 395,544,228,413.92/720,247.97
  6. Step 6: Final answer
    x = 549,177.84

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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.