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Finding the Fourth Proportional to 721,564.14, 995,760.27 and 399,296.28

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Solution

The fourth proportional to 721,564.14, 995,760.27 and 399,296.28 is: 551,029.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,564.14 : 995,760.27 = 399,296.28 : x
  2. Step 2: Convert to fraction form
    721,564.14/995,760.27 = 399,296.28/x
  3. Step 3: Cross multiply
    721,564.14x = 995,760.27 × 399,296.28
  4. Step 4: Simplify right side
    721,564.14x = 397,603,371,582.80
  5. Step 5: Solve for x
    x = 397,603,371,582.80/721,564.14
  6. Step 6: Final answer
    x = 551,029.84

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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.