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Finding the Fourth Proportional to 235,611.20, 353,416.80 and 220,059.20

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Solution

The fourth proportional to 235,611.20, 353,416.80 and 220,059.20 is: 330,088.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,611.20 : 353,416.80 = 220,059.20 : x
  2. Step 2: Convert to fraction form
    235,611.20/353,416.80 = 220,059.20/x
  3. Step 3: Cross multiply
    235,611.20x = 353,416.80 × 220,059.20
  4. Step 4: Simplify right side
    235,611.20x = 77,772,618,274.56
  5. Step 5: Solve for x
    x = 77,772,618,274.56/235,611.20
  6. Step 6: Final answer
    x = 330,088.80

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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.