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Finding the Fourth Proportional to 220,228.65, 330,364.80 and 70,431.30

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Solution

The fourth proportional to 220,228.65, 330,364.80 and 70,431.30 is: 105,653.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,228.65 : 330,364.80 = 70,431.30 : x
  2. Step 2: Convert to fraction form
    220,228.65/330,364.80 = 70,431.30/x
  3. Step 3: Cross multiply
    220,228.65x = 330,364.80 × 70,431.30
  4. Step 4: Simplify right side
    220,228.65x = 23,268,022,338.24
  5. Step 5: Solve for x
    x = 23,268,022,338.24/220,228.65
  6. Step 6: Final answer
    x = 105,653.93

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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.