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Finding the Fourth Proportional to 3,656.76, 5,486.13 and 1,317.03

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Solution

The fourth proportional to 3,656.76, 5,486.13 and 1,317.03 is: 1,975.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,656.76 : 5,486.13 = 1,317.03 : x
  2. Step 2: Convert to fraction form
    3,656.76/5,486.13 = 1,317.03/x
  3. Step 3: Cross multiply
    3,656.76x = 5,486.13 × 1,317.03
  4. Step 4: Simplify right side
    3,656.76x = 7,225,391.21
  5. Step 5: Solve for x
    x = 7,225,391.21/3,656.76
  6. Step 6: Final answer
    x = 1,975.90

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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.