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Finding the Fourth Proportional to 1,736.12, 2,601.88 and 761

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Solution

The fourth proportional to 1,736.12, 2,601.88 and 761 is: 1,140.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,736.12 : 2,601.88 = 761 : x
  2. Step 2: Convert to fraction form
    1,736.12/2,601.88 = 761/x
  3. Step 3: Cross multiply
    1,736.12x = 2,601.88 × 761
  4. Step 4: Simplify right side
    1,736.12x = 1,980,030.68
  5. Step 5: Solve for x
    x = 1,980,030.68/1,736.12
  6. Step 6: Final answer
    x = 1,140.49

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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.