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Finding the Fourth Proportional to 215,376.80, 323,065.20 and 149,021.60

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Solution

The fourth proportional to 215,376.80, 323,065.20 and 149,021.60 is: 223,532.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,376.80 : 323,065.20 = 149,021.60 : x
  2. Step 2: Convert to fraction form
    215,376.80/323,065.20 = 149,021.60/x
  3. Step 3: Cross multiply
    215,376.80x = 323,065.20 × 149,021.60
  4. Step 4: Simplify right side
    215,376.80x = 48,143,693,008.32
  5. Step 5: Solve for x
    x = 48,143,693,008.32/215,376.80
  6. Step 6: Final answer
    x = 223,532.40

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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.