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Finding the Fourth Proportional to 660.80, 995.60 and 608.32

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Solution

The fourth proportional to 660.80, 995.60 and 608.32 is: 916.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    660.80 : 995.60 = 608.32 : x
  2. Step 2: Convert to fraction form
    660.80/995.60 = 608.32/x
  3. Step 3: Cross multiply
    660.80x = 995.60 × 608.32
  4. Step 4: Simplify right side
    660.80x = 605,643.39
  5. Step 5: Solve for x
    x = 605,643.39/660.80
  6. Step 6: Final answer
    x = 916.53

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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.