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Finding the Fourth Proportional to 478,819.55, 660,778.31 and 261,028.34

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Solution

The fourth proportional to 478,819.55, 660,778.31 and 261,028.34 is: 360,223.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,819.55 : 660,778.31 = 261,028.34 : x
  2. Step 2: Convert to fraction form
    478,819.55/660,778.31 = 261,028.34/x
  3. Step 3: Cross multiply
    478,819.55x = 660,778.31 × 261,028.34
  4. Step 4: Simplify right side
    478,819.55x = 172,481,860,758.27
  5. Step 5: Solve for x
    x = 172,481,860,758.27/478,819.55
  6. Step 6: Final answer
    x = 360,223.10

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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.