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Finding the Fourth Proportional to 1,552.56, 2,142.58 and 853.96

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Solution

The fourth proportional to 1,552.56, 2,142.58 and 853.96 is: 1,178.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,552.56 : 2,142.58 = 853.96 : x
  2. Step 2: Convert to fraction form
    1,552.56/2,142.58 = 853.96/x
  3. Step 3: Cross multiply
    1,552.56x = 2,142.58 × 853.96
  4. Step 4: Simplify right side
    1,552.56x = 1,829,677.62
  5. Step 5: Solve for x
    x = 1,829,677.62/1,552.56
  6. Step 6: Final answer
    x = 1,178.49

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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.