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Finding the Fourth Proportional to 303,493.32, 418,978.08 and 221,729.76

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Solution

The fourth proportional to 303,493.32, 418,978.08 and 221,729.76 is: 306,101.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,493.32 : 418,978.08 = 221,729.76 : x
  2. Step 2: Convert to fraction form
    303,493.32/418,978.08 = 221,729.76/x
  3. Step 3: Cross multiply
    303,493.32x = 418,978.08 × 221,729.76
  4. Step 4: Simplify right side
    303,493.32x = 92,899,909,123.66
  5. Step 5: Solve for x
    x = 92,899,909,123.66/303,493.32
  6. Step 6: Final answer
    x = 306,101.99

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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.