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Finding the Fourth Proportional to 1,182.34, 1,770.28 and 853.61

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Solution

The fourth proportional to 1,182.34, 1,770.28 and 853.61 is: 1,278.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,182.34 : 1,770.28 = 853.61 : x
  2. Step 2: Convert to fraction form
    1,182.34/1,770.28 = 853.61/x
  3. Step 3: Cross multiply
    1,182.34x = 1,770.28 × 853.61
  4. Step 4: Simplify right side
    1,182.34x = 1,511,128.71
  5. Step 5: Solve for x
    x = 1,511,128.71/1,182.34
  6. Step 6: Final answer
    x = 1,278.08

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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.