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Finding the Fourth Proportional to 853.67, 1,177.28 and 569.59

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Solution

The fourth proportional to 853.67, 1,177.28 and 569.59 is: 785.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    853.67 : 1,177.28 = 569.59 : x
  2. Step 2: Convert to fraction form
    853.67/1,177.28 = 569.59/x
  3. Step 3: Cross multiply
    853.67x = 1,177.28 × 569.59
  4. Step 4: Simplify right side
    853.67x = 670,569.78
  5. Step 5: Solve for x
    x = 670,569.78/853.67
  6. Step 6: Final answer
    x = 785.51

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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.