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Finding the Fourth Proportional to 768.21, 1,060.28 and 436.60

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Solution

The fourth proportional to 768.21, 1,060.28 and 436.60 is: 602.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    768.21 : 1,060.28 = 436.60 : x
  2. Step 2: Convert to fraction form
    768.21/1,060.28 = 436.60/x
  3. Step 3: Cross multiply
    768.21x = 1,060.28 × 436.60
  4. Step 4: Simplify right side
    768.21x = 462,918.25
  5. Step 5: Solve for x
    x = 462,918.25/768.21
  6. Step 6: Final answer
    x = 602.59

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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.