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Finding the Fourth Proportional to 1,684.78, 2,525.43 and 818.02

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Solution

The fourth proportional to 1,684.78, 2,525.43 and 818.02 is: 1,226.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,684.78 : 2,525.43 = 818.02 : x
  2. Step 2: Convert to fraction form
    1,684.78/2,525.43 = 818.02/x
  3. Step 3: Cross multiply
    1,684.78x = 2,525.43 × 818.02
  4. Step 4: Simplify right side
    1,684.78x = 2,065,852.25
  5. Step 5: Solve for x
    x = 2,065,852.25/1,684.78
  6. Step 6: Final answer
    x = 1,226.19

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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.