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Finding the Fourth Proportional to 5,056.84, 6,978.45 and 2,818.81

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Solution

The fourth proportional to 5,056.84, 6,978.45 and 2,818.81 is: 3,889.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,056.84 : 6,978.45 = 2,818.81 : x
  2. Step 2: Convert to fraction form
    5,056.84/6,978.45 = 2,818.81/x
  3. Step 3: Cross multiply
    5,056.84x = 6,978.45 × 2,818.81
  4. Step 4: Simplify right side
    5,056.84x = 19,670,924.64
  5. Step 5: Solve for x
    x = 19,670,924.64/5,056.84
  6. Step 6: Final answer
    x = 3,889.96

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.