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Finding the Fourth Proportional to 1,186.20, 1,779.50 and 364.31

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Solution

The fourth proportional to 1,186.20, 1,779.50 and 364.31 is: 546.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,186.20 : 1,779.50 = 364.31 : x
  2. Step 2: Convert to fraction form
    1,186.20/1,779.50 = 364.31/x
  3. Step 3: Cross multiply
    1,186.20x = 1,779.50 × 364.31
  4. Step 4: Simplify right side
    1,186.20x = 648,278.93
  5. Step 5: Solve for x
    x = 648,278.93/1,186.20
  6. Step 6: Final answer
    x = 546.52

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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.