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Finding the Fourth Proportional to 721,208.07, 995,200.34 and 398,911.23

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Solution

The fourth proportional to 721,208.07, 995,200.34 and 398,911.23 is: 550,460.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,208.07 : 995,200.34 = 398,911.23 : x
  2. Step 2: Convert to fraction form
    721,208.07/995,200.34 = 398,911.23/x
  3. Step 3: Cross multiply
    721,208.07x = 995,200.34 × 398,911.23
  4. Step 4: Simplify right side
    721,208.07x = 396,996,586,749.82
  5. Step 5: Solve for x
    x = 396,996,586,749.82/721,208.07
  6. Step 6: Final answer
    x = 550,460.55

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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.