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Finding the Fourth Proportional to 1,758.26, 2,637.40 and 989.30

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Solution

The fourth proportional to 1,758.26, 2,637.40 and 989.30 is: 1,483.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,758.26 : 2,637.40 = 989.30 : x
  2. Step 2: Convert to fraction form
    1,758.26/2,637.40 = 989.30/x
  3. Step 3: Cross multiply
    1,758.26x = 2,637.40 × 989.30
  4. Step 4: Simplify right side
    1,758.26x = 2,609,179.82
  5. Step 5: Solve for x
    x = 2,609,179.82/1,758.26
  6. Step 6: Final answer
    x = 1,483.96

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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.