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Finding the Fourth Proportional to 721,143.86, 995,208.63 and 415,212.63

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Solution

The fourth proportional to 721,143.86, 995,208.63 and 415,212.63 is: 573,010.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,143.86 : 995,208.63 = 415,212.63 : x
  2. Step 2: Convert to fraction form
    721,143.86/995,208.63 = 415,212.63/x
  3. Step 3: Cross multiply
    721,143.86x = 995,208.63 × 415,212.63
  4. Step 4: Simplify right side
    721,143.86x = 413,223,192,969.97
  5. Step 5: Solve for x
    x = 413,223,192,969.97/721,143.86
  6. Step 6: Final answer
    x = 573,010.76

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Double scale
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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.