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Finding the Fourth Proportional to 661.02, 912.66 and 605.54

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Solution

The fourth proportional to 661.02, 912.66 and 605.54 is: 836.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    661.02 : 912.66 = 605.54 : x
  2. Step 2: Convert to fraction form
    661.02/912.66 = 605.54/x
  3. Step 3: Cross multiply
    661.02x = 912.66 × 605.54
  4. Step 4: Simplify right side
    661.02x = 552,652.14
  5. Step 5: Solve for x
    x = 552,652.14/661.02
  6. Step 6: Final answer
    x = 836.06

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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.