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Finding the Fourth Proportional to 321,611.50, 482,417.25 and 220,309.66

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Solution

The fourth proportional to 321,611.50, 482,417.25 and 220,309.66 is: 330,464.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,611.50 : 482,417.25 = 220,309.66 : x
  2. Step 2: Convert to fraction form
    321,611.50/482,417.25 = 220,309.66/x
  3. Step 3: Cross multiply
    321,611.50x = 482,417.25 × 220,309.66
  4. Step 4: Simplify right side
    321,611.50x = 106,281,180,325.64
  5. Step 5: Solve for x
    x = 106,281,180,325.64/321,611.50
  6. Step 6: Final answer
    x = 330,464.49

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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.