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Finding the Fourth Proportional to 1,274.60, 1,911.13 and 533.32

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Solution

The fourth proportional to 1,274.60, 1,911.13 and 533.32 is: 799.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,274.60 : 1,911.13 = 533.32 : x
  2. Step 2: Convert to fraction form
    1,274.60/1,911.13 = 533.32/x
  3. Step 3: Cross multiply
    1,274.60x = 1,911.13 × 533.32
  4. Step 4: Simplify right side
    1,274.60x = 1,019,243.85
  5. Step 5: Solve for x
    x = 1,019,243.85/1,274.60
  6. Step 6: Final answer
    x = 799.66

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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.