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Finding the Fourth Proportional to 490,997.80, 677,348.16 and 318,903.56

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Solution

The fourth proportional to 490,997.80, 677,348.16 and 318,903.56 is: 439,938.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    490,997.80 : 677,348.16 = 318,903.56 : x
  2. Step 2: Convert to fraction form
    490,997.80/677,348.16 = 318,903.56/x
  3. Step 3: Cross multiply
    490,997.80x = 677,348.16 × 318,903.56
  4. Step 4: Simplify right side
    490,997.80x = 216,008,739,583.45
  5. Step 5: Solve for x
    x = 216,008,739,583.45/490,997.80
  6. Step 6: Final answer
    x = 439,938.30

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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.