Home / 721,331.48-995,511.40-415,419.32

Finding the Fourth Proportional to 721,331.48, 995,511.40 and 415,419.32

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Solution

The fourth proportional to 721,331.48, 995,511.40 and 415,419.32 is: 573,321.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,331.48 : 995,511.40 = 415,419.32 : x
  2. Step 2: Convert to fraction form
    721,331.48/995,511.40 = 415,419.32/x
  3. Step 3: Cross multiply
    721,331.48x = 995,511.40 × 415,419.32
  4. Step 4: Simplify right side
    721,331.48x = 413,554,668,840.25
  5. Step 5: Solve for x
    x = 413,554,668,840.25/721,331.48
  6. Step 6: Final answer
    x = 573,321.25

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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.