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Finding the Fourth Proportional to 720,827.08, 994,813.86 and 398,561.56

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Solution

The fourth proportional to 720,827.08, 994,813.86 and 398,561.56 is: 550,055.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,827.08 : 994,813.86 = 398,561.56 : x
  2. Step 2: Convert to fraction form
    720,827.08/994,813.86 = 398,561.56/x
  3. Step 3: Cross multiply
    720,827.08x = 994,813.86 × 398,561.56
  4. Step 4: Simplify right side
    720,827.08x = 396,494,563,951.22
  5. Step 5: Solve for x
    x = 396,494,563,951.22/720,827.08
  6. Step 6: Final answer
    x = 550,055.03

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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.