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Finding the Fourth Proportional to 330,711.58, 456,607.29 and 221,978.80

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Solution

The fourth proportional to 330,711.58, 456,607.29 and 221,978.80 is: 306,481.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    330,711.58 : 456,607.29 = 221,978.80 : x
  2. Step 2: Convert to fraction form
    330,711.58/456,607.29 = 221,978.80/x
  3. Step 3: Cross multiply
    330,711.58x = 456,607.29 × 221,978.80
  4. Step 4: Simplify right side
    330,711.58x = 101,357,138,305.45
  5. Step 5: Solve for x
    x = 101,357,138,305.45/330,711.58
  6. Step 6: Final answer
    x = 306,481.98

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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.