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Finding the Fourth Proportional to 1,174.51, 1,620.75 and 650.50

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Solution

The fourth proportional to 1,174.51, 1,620.75 and 650.50 is: 897.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,174.51 : 1,620.75 = 650.50 : x
  2. Step 2: Convert to fraction form
    1,174.51/1,620.75 = 650.50/x
  3. Step 3: Cross multiply
    1,174.51x = 1,620.75 × 650.50
  4. Step 4: Simplify right side
    1,174.51x = 1,054,297.88
  5. Step 5: Solve for x
    x = 1,054,297.88/1,174.51
  6. Step 6: Final answer
    x = 897.65

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.