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Finding the Fourth Proportional to 1,706.64, 2,558.14 and 1,218.21

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Solution

The fourth proportional to 1,706.64, 2,558.14 and 1,218.21 is: 1,826.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,706.64 : 2,558.14 = 1,218.21 : x
  2. Step 2: Convert to fraction form
    1,706.64/2,558.14 = 1,218.21/x
  3. Step 3: Cross multiply
    1,706.64x = 2,558.14 × 1,218.21
  4. Step 4: Simplify right side
    1,706.64x = 3,116,369.24
  5. Step 5: Solve for x
    x = 3,116,369.24/1,706.64
  6. Step 6: Final answer
    x = 1,826.02

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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.