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Finding the Fourth Proportional to 721,553.96, 995,702.94 and 399,247.85

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Solution

The fourth proportional to 721,553.96, 995,702.94 and 399,247.85 is: 550,939.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,553.96 : 995,702.94 = 399,247.85 : x
  2. Step 2: Convert to fraction form
    721,553.96/995,702.94 = 399,247.85/x
  3. Step 3: Cross multiply
    721,553.96x = 995,702.94 × 399,247.85
  4. Step 4: Simplify right side
    721,553.96x = 397,532,258,033.68
  5. Step 5: Solve for x
    x = 397,532,258,033.68/721,553.96
  6. Step 6: Final answer
    x = 550,939.06

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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.