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Finding the Fourth Proportional to 1,213.48, 1,818.37 and 482.68

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Solution

The fourth proportional to 1,213.48, 1,818.37 and 482.68 is: 723.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,213.48 : 1,818.37 = 482.68 : x
  2. Step 2: Convert to fraction form
    1,213.48/1,818.37 = 482.68/x
  3. Step 3: Cross multiply
    1,213.48x = 1,818.37 × 482.68
  4. Step 4: Simplify right side
    1,213.48x = 877,690.83
  5. Step 5: Solve for x
    x = 877,690.83/1,213.48
  6. Step 6: Final answer
    x = 723.28

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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.