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Finding the Fourth Proportional to 2,756.40, 4,133.64 and 808.08

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Solution

The fourth proportional to 2,756.40, 4,133.64 and 808.08 is: 1,211.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,756.40 : 4,133.64 = 808.08 : x
  2. Step 2: Convert to fraction form
    2,756.40/4,133.64 = 808.08/x
  3. Step 3: Cross multiply
    2,756.40x = 4,133.64 × 808.08
  4. Step 4: Simplify right side
    2,756.40x = 3,340,311.81
  5. Step 5: Solve for x
    x = 3,340,311.81/2,756.40
  6. Step 6: Final answer
    x = 1,211.84

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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.