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Finding the Fourth Proportional to 330,783.98, 456,642.30 and 221,848.50

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Solution

The fourth proportional to 330,783.98, 456,642.30 and 221,848.50 is: 306,258.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    330,783.98 : 456,642.30 = 221,848.50 : x
  2. Step 2: Convert to fraction form
    330,783.98/456,642.30 = 221,848.50/x
  3. Step 3: Cross multiply
    330,783.98x = 456,642.30 × 221,848.50
  4. Step 4: Simplify right side
    330,783.98x = 101,305,409,291.55
  5. Step 5: Solve for x
    x = 101,305,409,291.55/330,783.98
  6. Step 6: Final answer
    x = 306,258.51

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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.