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Finding the Fourth Proportional to 664,715.40, 995,906.70 and 545,742.60

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Solution

The fourth proportional to 664,715.40, 995,906.70 and 545,742.60 is: 817,656.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,715.40 : 995,906.70 = 545,742.60 : x
  2. Step 2: Convert to fraction form
    664,715.40/995,906.70 = 545,742.60/x
  3. Step 3: Cross multiply
    664,715.40x = 995,906.70 × 545,742.60
  4. Step 4: Simplify right side
    664,715.40x = 543,508,711,815.42
  5. Step 5: Solve for x
    x = 543,508,711,815.42/664,715.40
  6. Step 6: Final answer
    x = 817,656.27

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.