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Finding the Fourth Proportional to 2,657.71, 3,985.94 and 1,197.28

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Solution

The fourth proportional to 2,657.71, 3,985.94 and 1,197.28 is: 1,795.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,657.71 : 3,985.94 = 1,197.28 : x
  2. Step 2: Convert to fraction form
    2,657.71/3,985.94 = 1,197.28/x
  3. Step 3: Cross multiply
    2,657.71x = 3,985.94 × 1,197.28
  4. Step 4: Simplify right side
    2,657.71x = 4,772,294.22
  5. Step 5: Solve for x
    x = 4,772,294.22/2,657.71
  6. Step 6: Final answer
    x = 1,795.64

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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.