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Finding the Fourth Proportional to 5,185.07, 7,776 and 1,486.31

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Solution

The fourth proportional to 5,185.07, 7,776 and 1,486.31 is: 2,229.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,185.07 : 7,776 = 1,486.31 : x
  2. Step 2: Convert to fraction form
    5,185.07/7,776 = 1,486.31/x
  3. Step 3: Cross multiply
    5,185.07x = 7,776 × 1,486.31
  4. Step 4: Simplify right side
    5,185.07x = 11,557,507.68
  5. Step 5: Solve for x
    x = 11,557,507.68/5,185.07
  6. Step 6: Final answer
    x = 2,229.00

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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.