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Finding the Fourth Proportional to 485,055, 669,375.90 and 283,851

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Solution

The fourth proportional to 485,055, 669,375.90 and 283,851 is: 391,714.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,055 : 669,375.90 = 283,851 : x
  2. Step 2: Convert to fraction form
    485,055/669,375.90 = 283,851/x
  3. Step 3: Cross multiply
    485,055x = 669,375.90 × 283,851
  4. Step 4: Simplify right side
    485,055x = 190,003,018,590.90
  5. Step 5: Solve for x
    x = 190,003,018,590.90/485,055
  6. Step 6: Final answer
    x = 391,714.38

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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.