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Finding the Fourth Proportional to 221,298.60, 331,947.90 and 219,330.30

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Solution

The fourth proportional to 221,298.60, 331,947.90 and 219,330.30 is: 328,995.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,298.60 : 331,947.90 = 219,330.30 : x
  2. Step 2: Convert to fraction form
    221,298.60/331,947.90 = 219,330.30/x
  3. Step 3: Cross multiply
    221,298.60x = 331,947.90 × 219,330.30
  4. Step 4: Simplify right side
    221,298.60x = 72,806,232,491.37
  5. Step 5: Solve for x
    x = 72,806,232,491.37/221,298.60
  6. Step 6: Final answer
    x = 328,995.45

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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.