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Finding the Fourth Proportional to 675.60, 1,012.80 and 236.64

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Solution

The fourth proportional to 675.60, 1,012.80 and 236.64 is: 354.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    675.60 : 1,012.80 = 236.64 : x
  2. Step 2: Convert to fraction form
    675.60/1,012.80 = 236.64/x
  3. Step 3: Cross multiply
    675.60x = 1,012.80 × 236.64
  4. Step 4: Simplify right side
    675.60x = 239,668.99
  5. Step 5: Solve for x
    x = 239,668.99/675.60
  6. Step 6: Final answer
    x = 354.75

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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.