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Finding the Fourth Proportional to 1,186.07, 1,779.92 and 416.57

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Solution

The fourth proportional to 1,186.07, 1,779.92 and 416.57 is: 625.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,186.07 : 1,779.92 = 416.57 : x
  2. Step 2: Convert to fraction form
    1,186.07/1,779.92 = 416.57/x
  3. Step 3: Cross multiply
    1,186.07x = 1,779.92 × 416.57
  4. Step 4: Simplify right side
    1,186.07x = 741,461.27
  5. Step 5: Solve for x
    x = 741,461.27/1,186.07
  6. Step 6: Final answer
    x = 625.14

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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.