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Finding the Fourth Proportional to 1,213.71, 1,821.48 and 483.81

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Solution

The fourth proportional to 1,213.71, 1,821.48 and 483.81 is: 726.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,213.71 : 1,821.48 = 483.81 : x
  2. Step 2: Convert to fraction form
    1,213.71/1,821.48 = 483.81/x
  3. Step 3: Cross multiply
    1,213.71x = 1,821.48 × 483.81
  4. Step 4: Simplify right side
    1,213.71x = 881,250.24
  5. Step 5: Solve for x
    x = 881,250.24/1,213.71
  6. Step 6: Final answer
    x = 726.08

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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.