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Finding the Fourth Proportional to 721,078.49, 995,221.44 and 463,277.71

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Solution

The fourth proportional to 721,078.49, 995,221.44 and 463,277.71 is: 639,408.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,078.49 : 995,221.44 = 463,277.71 : x
  2. Step 2: Convert to fraction form
    721,078.49/995,221.44 = 463,277.71/x
  3. Step 3: Cross multiply
    721,078.49x = 995,221.44 × 463,277.71
  4. Step 4: Simplify right side
    721,078.49x = 461,063,909,666.10
  5. Step 5: Solve for x
    x = 461,063,909,666.10/721,078.49
  6. Step 6: Final answer
    x = 639,408.77

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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.