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Finding the Fourth Proportional to 1,222.02, 1,833.12 and 491.60

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Solution

The fourth proportional to 1,222.02, 1,833.12 and 491.60 is: 737.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,222.02 : 1,833.12 = 491.60 : x
  2. Step 2: Convert to fraction form
    1,222.02/1,833.12 = 491.60/x
  3. Step 3: Cross multiply
    1,222.02x = 1,833.12 × 491.60
  4. Step 4: Simplify right side
    1,222.02x = 901,161.79
  5. Step 5: Solve for x
    x = 901,161.79/1,222.02
  6. Step 6: Final answer
    x = 737.44

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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.