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Finding the Fourth Proportional to 883.02, 1,218.66 and 661.59

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Solution

The fourth proportional to 883.02, 1,218.66 and 661.59 is: 913.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    883.02 : 1,218.66 = 661.59 : x
  2. Step 2: Convert to fraction form
    883.02/1,218.66 = 661.59/x
  3. Step 3: Cross multiply
    883.02x = 1,218.66 × 661.59
  4. Step 4: Simplify right side
    883.02x = 806,253.27
  5. Step 5: Solve for x
    x = 806,253.27/883.02
  6. Step 6: Final answer
    x = 913.06

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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.