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Finding the Fourth Proportional to 1,186.41, 1,779.81 and 528.51

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Solution

The fourth proportional to 1,186.41, 1,779.81 and 528.51 is: 792.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,186.41 : 1,779.81 = 528.51 : x
  2. Step 2: Convert to fraction form
    1,186.41/1,779.81 = 528.51/x
  3. Step 3: Cross multiply
    1,186.41x = 1,779.81 × 528.51
  4. Step 4: Simplify right side
    1,186.41x = 940,647.38
  5. Step 5: Solve for x
    x = 940,647.38/1,186.41
  6. Step 6: Final answer
    x = 792.85

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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.