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Finding the Fourth Proportional to 220,601.40, 328,407.12 and 219,289.20

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Solution

The fourth proportional to 220,601.40, 328,407.12 and 219,289.20 is: 326,453.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,601.40 : 328,407.12 = 219,289.20 : x
  2. Step 2: Convert to fraction form
    220,601.40/328,407.12 = 219,289.20/x
  3. Step 3: Cross multiply
    220,601.40x = 328,407.12 × 219,289.20
  4. Step 4: Simplify right side
    220,601.40x = 72,016,134,619.10
  5. Step 5: Solve for x
    x = 72,016,134,619.10/220,601.40
  6. Step 6: Final answer
    x = 326,453.66

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.