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Finding the Fourth Proportional to 1,213.74, 1,821.54 and 483.36

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Solution

The fourth proportional to 1,213.74, 1,821.54 and 483.36 is: 725.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,213.74 : 1,821.54 = 483.36 : x
  2. Step 2: Convert to fraction form
    1,213.74/1,821.54 = 483.36/x
  3. Step 3: Cross multiply
    1,213.74x = 1,821.54 × 483.36
  4. Step 4: Simplify right side
    1,213.74x = 880,459.57
  5. Step 5: Solve for x
    x = 880,459.57/1,213.74
  6. Step 6: Final answer
    x = 725.41

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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.