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Finding the Fourth Proportional to 2,174.40, 3,254.40 and 1,684.80

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Solution

The fourth proportional to 2,174.40, 3,254.40 and 1,684.80 is: 2,521.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,174.40 : 3,254.40 = 1,684.80 : x
  2. Step 2: Convert to fraction form
    2,174.40/3,254.40 = 1,684.80/x
  3. Step 3: Cross multiply
    2,174.40x = 3,254.40 × 1,684.80
  4. Step 4: Simplify right side
    2,174.40x = 5,483,013.12
  5. Step 5: Solve for x
    x = 5,483,013.12/2,174.40
  6. Step 6: Final answer
    x = 2,521.62

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1.5x scale

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.