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Finding the Fourth Proportional to 1,186.27, 1,779.41 and 308.77

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Solution

The fourth proportional to 1,186.27, 1,779.41 and 308.77 is: 463.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,186.27 : 1,779.41 = 308.77 : x
  2. Step 2: Convert to fraction form
    1,186.27/1,779.41 = 308.77/x
  3. Step 3: Cross multiply
    1,186.27x = 1,779.41 × 308.77
  4. Step 4: Simplify right side
    1,186.27x = 549,424.75
  5. Step 5: Solve for x
    x = 549,424.75/1,186.27
  6. Step 6: Final answer
    x = 463.15

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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.