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Finding the Fourth Proportional to 1,222.60, 1,833.48 and 491.98

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Solution

The fourth proportional to 1,222.60, 1,833.48 and 491.98 is: 737.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,222.60 : 1,833.48 = 491.98 : x
  2. Step 2: Convert to fraction form
    1,222.60/1,833.48 = 491.98/x
  3. Step 3: Cross multiply
    1,222.60x = 1,833.48 × 491.98
  4. Step 4: Simplify right side
    1,222.60x = 902,035.49
  5. Step 5: Solve for x
    x = 902,035.49/1,222.60
  6. Step 6: Final answer
    x = 737.80

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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.