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Finding the Fourth Proportional to 1,186.29, 1,779.63 and 528.40

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Solution

The fourth proportional to 1,186.29, 1,779.63 and 528.40 is: 792.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,186.29 : 1,779.63 = 528.40 : x
  2. Step 2: Convert to fraction form
    1,186.29/1,779.63 = 528.40/x
  3. Step 3: Cross multiply
    1,186.29x = 1,779.63 × 528.40
  4. Step 4: Simplify right side
    1,186.29x = 940,356.49
  5. Step 5: Solve for x
    x = 940,356.49/1,186.29
  6. Step 6: Final answer
    x = 792.69

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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.