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Finding the Fourth Proportional to 1,115.86, 1,673.87 and 569.14

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Solution

The fourth proportional to 1,115.86, 1,673.87 and 569.14 is: 853.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,115.86 : 1,673.87 = 569.14 : x
  2. Step 2: Convert to fraction form
    1,115.86/1,673.87 = 569.14/x
  3. Step 3: Cross multiply
    1,115.86x = 1,673.87 × 569.14
  4. Step 4: Simplify right side
    1,115.86x = 952,666.37
  5. Step 5: Solve for x
    x = 952,666.37/1,115.86
  6. Step 6: Final answer
    x = 853.75

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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.