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Finding the Fourth Proportional to 365,620.80, 548,431.20 and 318,964.80

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Solution

The fourth proportional to 365,620.80, 548,431.20 and 318,964.80 is: 478,447.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    365,620.80 : 548,431.20 = 318,964.80 : x
  2. Step 2: Convert to fraction form
    365,620.80/548,431.20 = 318,964.80/x
  3. Step 3: Cross multiply
    365,620.80x = 548,431.20 × 318,964.80
  4. Step 4: Simplify right side
    365,620.80x = 174,930,248,021.76
  5. Step 5: Solve for x
    x = 174,930,248,021.76/365,620.80
  6. Step 6: Final answer
    x = 478,447.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.