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Finding the Fourth Proportional to 580,079.51, 800,656.86 and 396,392.43

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Solution

The fourth proportional to 580,079.51, 800,656.86 and 396,392.43 is: 547,122.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    580,079.51 : 800,656.86 = 396,392.43 : x
  2. Step 2: Convert to fraction form
    580,079.51/800,656.86 = 396,392.43/x
  3. Step 3: Cross multiply
    580,079.51x = 800,656.86 × 396,392.43
  4. Step 4: Simplify right side
    580,079.51x = 317,374,318,331.57
  5. Step 5: Solve for x
    x = 317,374,318,331.57/580,079.51
  6. Step 6: Final answer
    x = 547,122.10

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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.