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Finding the Fourth Proportional to 1,212.70, 1,818.93 and 482.08

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Solution

The fourth proportional to 1,212.70, 1,818.93 and 482.08 is: 723.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,212.70 : 1,818.93 = 482.08 : x
  2. Step 2: Convert to fraction form
    1,212.70/1,818.93 = 482.08/x
  3. Step 3: Cross multiply
    1,212.70x = 1,818.93 × 482.08
  4. Step 4: Simplify right side
    1,212.70x = 876,869.77
  5. Step 5: Solve for x
    x = 876,869.77/1,212.70
  6. Step 6: Final answer
    x = 723.07

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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.