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Finding the Fourth Proportional to 1,637.90, 2,451.90 and 1,271.06

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Solution

The fourth proportional to 1,637.90, 2,451.90 and 1,271.06 is: 1,902.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,637.90 : 2,451.90 = 1,271.06 : x
  2. Step 2: Convert to fraction form
    1,637.90/2,451.90 = 1,271.06/x
  3. Step 3: Cross multiply
    1,637.90x = 2,451.90 × 1,271.06
  4. Step 4: Simplify right side
    1,637.90x = 3,116,512.01
  5. Step 5: Solve for x
    x = 3,116,512.01/1,637.90
  6. Step 6: Final answer
    x = 1,902.75

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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.