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Finding the Fourth Proportional to 403,309.40, 604,964.10 and 263,226.20

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Solution

The fourth proportional to 403,309.40, 604,964.10 and 263,226.20 is: 394,839.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,309.40 : 604,964.10 = 263,226.20 : x
  2. Step 2: Convert to fraction form
    403,309.40/604,964.10 = 263,226.20/x
  3. Step 3: Cross multiply
    403,309.40x = 604,964.10 × 263,226.20
  4. Step 4: Simplify right side
    403,309.40x = 159,242,401,179.42
  5. Step 5: Solve for x
    x = 159,242,401,179.42/403,309.40
  6. Step 6: Final answer
    x = 394,839.30

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Similar ratio
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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.