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Finding the Fourth Proportional to 1,837.90, 2,756.99 and 742.29

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Solution

The fourth proportional to 1,837.90, 2,756.99 and 742.29 is: 1,113.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,837.90 : 2,756.99 = 742.29 : x
  2. Step 2: Convert to fraction form
    1,837.90/2,756.99 = 742.29/x
  3. Step 3: Cross multiply
    1,837.90x = 2,756.99 × 742.29
  4. Step 4: Simplify right side
    1,837.90x = 2,046,486.11
  5. Step 5: Solve for x
    x = 2,046,486.11/1,837.90
  6. Step 6: Final answer
    x = 1,113.49

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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.