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Finding the Fourth Proportional to 2,655.84, 3,980.64 and 1,193.28

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Solution

The fourth proportional to 2,655.84, 3,980.64 and 1,193.28 is: 1,788.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,655.84 : 3,980.64 = 1,193.28 : x
  2. Step 2: Convert to fraction form
    2,655.84/3,980.64 = 1,193.28/x
  3. Step 3: Cross multiply
    2,655.84x = 3,980.64 × 1,193.28
  4. Step 4: Simplify right side
    2,655.84x = 4,750,018.10
  5. Step 5: Solve for x
    x = 4,750,018.10/2,655.84
  6. Step 6: Final answer
    x = 1,788.52

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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.