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Finding the Fourth Proportional to 660.60, 991.44 and 607.32

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Solution

The fourth proportional to 660.60, 991.44 and 607.32 is: 911.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    660.60 : 991.44 = 607.32 : x
  2. Step 2: Convert to fraction form
    660.60/991.44 = 607.32/x
  3. Step 3: Cross multiply
    660.60x = 991.44 × 607.32
  4. Step 4: Simplify right side
    660.60x = 602,121.34
  5. Step 5: Solve for x
    x = 602,121.34/660.60
  6. Step 6: Final answer
    x = 911.48

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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.