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Finding the Fourth Proportional to 2,178.76, 3,268.20 and 535.30

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Solution

The fourth proportional to 2,178.76, 3,268.20 and 535.30 is: 802.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,178.76 : 3,268.20 = 535.30 : x
  2. Step 2: Convert to fraction form
    2,178.76/3,268.20 = 535.30/x
  3. Step 3: Cross multiply
    2,178.76x = 3,268.20 × 535.30
  4. Step 4: Simplify right side
    2,178.76x = 1,749,467.46
  5. Step 5: Solve for x
    x = 1,749,467.46/2,178.76
  6. Step 6: Final answer
    x = 802.96

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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.