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Finding the Fourth Proportional to 721,626.66, 995,820.29 and 399,350.34

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Solution

The fourth proportional to 721,626.66, 995,820.29 and 399,350.34 is: 551,089.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,626.66 : 995,820.29 = 399,350.34 : x
  2. Step 2: Convert to fraction form
    721,626.66/995,820.29 = 399,350.34/x
  3. Step 3: Cross multiply
    721,626.66x = 995,820.29 × 399,350.34
  4. Step 4: Simplify right side
    721,626.66x = 397,681,171,390.40
  5. Step 5: Solve for x
    x = 397,681,171,390.40/721,626.66
  6. Step 6: Final answer
    x = 551,089.91

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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.