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Finding the Fourth Proportional to 879, 1,316.55 and 569.92

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Solution

The fourth proportional to 879, 1,316.55 and 569.92 is: 853.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    879 : 1,316.55 = 569.92 : x
  2. Step 2: Convert to fraction form
    879/1,316.55 = 569.92/x
  3. Step 3: Cross multiply
    879x = 1,316.55 × 569.92
  4. Step 4: Simplify right side
    879x = 750,324.88
  5. Step 5: Solve for x
    x = 750,324.88/879
  6. Step 6: Final answer
    x = 853.61

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.