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Finding the Fourth Proportional to 883.46, 1,218.72 and 568.64

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Solution

The fourth proportional to 883.46, 1,218.72 and 568.64 is: 784.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    883.46 : 1,218.72 = 568.64 : x
  2. Step 2: Convert to fraction form
    883.46/1,218.72 = 568.64/x
  3. Step 3: Cross multiply
    883.46x = 1,218.72 × 568.64
  4. Step 4: Simplify right side
    883.46x = 693,012.94
  5. Step 5: Solve for x
    x = 693,012.94/883.46
  6. Step 6: Final answer
    x = 784.43

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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.