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Finding the Fourth Proportional to 1,167.21, 1,751.09 and 345.74

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Solution

The fourth proportional to 1,167.21, 1,751.09 and 345.74 is: 518.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,167.21 : 1,751.09 = 345.74 : x
  2. Step 2: Convert to fraction form
    1,167.21/1,751.09 = 345.74/x
  3. Step 3: Cross multiply
    1,167.21x = 1,751.09 × 345.74
  4. Step 4: Simplify right side
    1,167.21x = 605,411.37
  5. Step 5: Solve for x
    x = 605,411.37/1,167.21
  6. Step 6: Final answer
    x = 518.68

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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.