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Finding the Fourth Proportional to 393,307.20, 590,106.60 and 156,819.60

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Solution

The fourth proportional to 393,307.20, 590,106.60 and 156,819.60 is: 235,287.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,307.20 : 590,106.60 = 156,819.60 : x
  2. Step 2: Convert to fraction form
    393,307.20/590,106.60 = 156,819.60/x
  3. Step 3: Cross multiply
    393,307.20x = 590,106.60 × 156,819.60
  4. Step 4: Simplify right side
    393,307.20x = 92,540,280,969.36
  5. Step 5: Solve for x
    x = 92,540,280,969.36/393,307.20
  6. Step 6: Final answer
    x = 235,287.53

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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.