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Finding the Fourth Proportional to 318,643.20, 440,121.60 and 233,625.60

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Solution

The fourth proportional to 318,643.20, 440,121.60 and 233,625.60 is: 322,692.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,643.20 : 440,121.60 = 233,625.60 : x
  2. Step 2: Convert to fraction form
    318,643.20/440,121.60 = 233,625.60/x
  3. Step 3: Cross multiply
    318,643.20x = 440,121.60 × 233,625.60
  4. Step 4: Simplify right side
    318,643.20x = 102,823,672,872.96
  5. Step 5: Solve for x
    x = 102,823,672,872.96/318,643.20
  6. Step 6: Final answer
    x = 322,692.19

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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.