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Finding the Fourth Proportional to 720,790.94, 994,712.27 and 398,521.85

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Solution

The fourth proportional to 720,790.94, 994,712.27 and 398,521.85 is: 549,971.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,790.94 : 994,712.27 = 398,521.85 : x
  2. Step 2: Convert to fraction form
    720,790.94/994,712.27 = 398,521.85/x
  3. Step 3: Cross multiply
    720,790.94x = 994,712.27 × 398,521.85
  4. Step 4: Simplify right side
    720,790.94x = 396,414,567,091.93
  5. Step 5: Solve for x
    x = 396,414,567,091.93/720,790.94
  6. Step 6: Final answer
    x = 549,971.63

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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.