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Finding the Fourth Proportional to 2,212.61, 3,319.09 and 569.15

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Solution

The fourth proportional to 2,212.61, 3,319.09 and 569.15 is: 853.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,212.61 : 3,319.09 = 569.15 : x
  2. Step 2: Convert to fraction form
    2,212.61/3,319.09 = 569.15/x
  3. Step 3: Cross multiply
    2,212.61x = 3,319.09 × 569.15
  4. Step 4: Simplify right side
    2,212.61x = 1,889,060.07
  5. Step 5: Solve for x
    x = 1,889,060.07/2,212.61
  6. Step 6: Final answer
    x = 853.77

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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.