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Finding the Fourth Proportional to 1,186.70, 1,780.24 and 364.80

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Solution

The fourth proportional to 1,186.70, 1,780.24 and 364.80 is: 547.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,186.70 : 1,780.24 = 364.80 : x
  2. Step 2: Convert to fraction form
    1,186.70/1,780.24 = 364.80/x
  3. Step 3: Cross multiply
    1,186.70x = 1,780.24 × 364.80
  4. Step 4: Simplify right side
    1,186.70x = 649,431.55
  5. Step 5: Solve for x
    x = 649,431.55/1,186.70
  6. Step 6: Final answer
    x = 547.26

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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.