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Finding the Fourth Proportional to 279,622.60, 418,559.10 and 220,136.20

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Solution

The fourth proportional to 279,622.60, 418,559.10 and 220,136.20 is: 329,515.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,622.60 : 418,559.10 = 220,136.20 : x
  2. Step 2: Convert to fraction form
    279,622.60/418,559.10 = 220,136.20/x
  3. Step 3: Cross multiply
    279,622.60x = 418,559.10 × 220,136.20
  4. Step 4: Simplify right side
    279,622.60x = 92,140,009,749.42
  5. Step 5: Solve for x
    x = 92,140,009,749.42/279,622.60
  6. Step 6: Final answer
    x = 329,515.60

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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.