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Finding the Fourth Proportional to 883.57, 1,218.78 and 569.25

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Solution

The fourth proportional to 883.57, 1,218.78 and 569.25 is: 785.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    883.57 : 1,218.78 = 569.25 : x
  2. Step 2: Convert to fraction form
    883.57/1,218.78 = 569.25/x
  3. Step 3: Cross multiply
    883.57x = 1,218.78 × 569.25
  4. Step 4: Simplify right side
    883.57x = 693,790.52
  5. Step 5: Solve for x
    x = 693,790.52/883.57
  6. Step 6: Final answer
    x = 785.21

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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.