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Finding the Fourth Proportional to 721,834.64, 995,902.80 and 419,970.32

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Solution

The fourth proportional to 721,834.64, 995,902.80 and 419,970.32 is: 579,425.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,834.64 : 995,902.80 = 419,970.32 : x
  2. Step 2: Convert to fraction form
    721,834.64/995,902.80 = 419,970.32/x
  3. Step 3: Cross multiply
    721,834.64x = 995,902.80 × 419,970.32
  4. Step 4: Simplify right side
    721,834.64x = 418,249,617,604.90
  5. Step 5: Solve for x
    x = 418,249,617,604.90/721,834.64
  6. Step 6: Final answer
    x = 579,425.81

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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.