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Finding the Fourth Proportional to 720,886.10, 994,843.77 and 394,218.32

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Solution

The fourth proportional to 720,886.10, 994,843.77 and 394,218.32 is: 544,032.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,886.10 : 994,843.77 = 394,218.32 : x
  2. Step 2: Convert to fraction form
    720,886.10/994,843.77 = 394,218.32/x
  3. Step 3: Cross multiply
    720,886.10x = 994,843.77 × 394,218.32
  4. Step 4: Simplify right side
    720,886.10x = 392,185,639,671.87
  5. Step 5: Solve for x
    x = 392,185,639,671.87/720,886.10
  6. Step 6: Final answer
    x = 544,032.74

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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.