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Finding the Fourth Proportional to 721,381.95, 995,516.93 and 449,559.72

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Solution

The fourth proportional to 721,381.95, 995,516.93 and 449,559.72 is: 620,398.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,381.95 : 995,516.93 = 449,559.72 : x
  2. Step 2: Convert to fraction form
    721,381.95/995,516.93 = 449,559.72/x
  3. Step 3: Cross multiply
    721,381.95x = 995,516.93 × 449,559.72
  4. Step 4: Simplify right side
    721,381.95x = 447,544,313,429.96
  5. Step 5: Solve for x
    x = 447,544,313,429.96/721,381.95
  6. Step 6: Final answer
    x = 620,398.55

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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.