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Finding the Fourth Proportional to 2,543.36, 3,812.12 and 982.68

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Solution

The fourth proportional to 2,543.36, 3,812.12 and 982.68 is: 1,472.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,543.36 : 3,812.12 = 982.68 : x
  2. Step 2: Convert to fraction form
    2,543.36/3,812.12 = 982.68/x
  3. Step 3: Cross multiply
    2,543.36x = 3,812.12 × 982.68
  4. Step 4: Simplify right side
    2,543.36x = 3,746,089.17
  5. Step 5: Solve for x
    x = 3,746,089.17/2,543.36
  6. Step 6: Final answer
    x = 1,472.89

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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.