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Finding the Fourth Proportional to 1,221.79, 1,833.44 and 528.46

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Solution

The fourth proportional to 1,221.79, 1,833.44 and 528.46 is: 793.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,221.79 : 1,833.44 = 528.46 : x
  2. Step 2: Convert to fraction form
    1,221.79/1,833.44 = 528.46/x
  3. Step 3: Cross multiply
    1,221.79x = 1,833.44 × 528.46
  4. Step 4: Simplify right side
    1,221.79x = 968,899.70
  5. Step 5: Solve for x
    x = 968,899.70/1,221.79
  6. Step 6: Final answer
    x = 793.02

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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.