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Finding the Fourth Proportional to 611.12, 921.20 and 602.48

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Solution

The fourth proportional to 611.12, 921.20 and 602.48 is: 908.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    611.12 : 921.20 = 602.48 : x
  2. Step 2: Convert to fraction form
    611.12/921.20 = 602.48/x
  3. Step 3: Cross multiply
    611.12x = 921.20 × 602.48
  4. Step 4: Simplify right side
    611.12x = 555,004.58
  5. Step 5: Solve for x
    x = 555,004.58/611.12
  6. Step 6: Final answer
    x = 908.18

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.