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Finding the Fourth Proportional to 688.30, 950.28 and 436.60

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Solution

The fourth proportional to 688.30, 950.28 and 436.60 is: 602.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    688.30 : 950.28 = 436.60 : x
  2. Step 2: Convert to fraction form
    688.30/950.28 = 436.60/x
  3. Step 3: Cross multiply
    688.30x = 950.28 × 436.60
  4. Step 4: Simplify right side
    688.30x = 414,892.25
  5. Step 5: Solve for x
    x = 414,892.25/688.30
  6. Step 6: Final answer
    x = 602.78

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.