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Finding the Fourth Proportional to 721,377, 995,546.34 and 403,425

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Solution

The fourth proportional to 721,377, 995,546.34 and 403,425 is: 556,752.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,377 : 995,546.34 = 403,425 : x
  2. Step 2: Convert to fraction form
    721,377/995,546.34 = 403,425/x
  3. Step 3: Cross multiply
    721,377x = 995,546.34 × 403,425
  4. Step 4: Simplify right side
    721,377x = 401,628,282,214.50
  5. Step 5: Solve for x
    x = 401,628,282,214.50/721,377
  6. Step 6: Final answer
    x = 556,752.27

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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.