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Finding the Fourth Proportional to 718,091.32, 990,972.84 and 395,813.92

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Solution

The fourth proportional to 718,091.32, 990,972.84 and 395,813.92 is: 546,226.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,091.32 : 990,972.84 = 395,813.92 : x
  2. Step 2: Convert to fraction form
    718,091.32/990,972.84 = 395,813.92/x
  3. Step 3: Cross multiply
    718,091.32x = 990,972.84 × 395,813.92
  4. Step 4: Simplify right side
    718,091.32x = 392,240,844,413.93
  5. Step 5: Solve for x
    x = 392,240,844,413.93/718,091.32
  6. Step 6: Final answer
    x = 546,226.97

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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.