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Finding the Fourth Proportional to 1,168.63, 1,751.93 and 438.21

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Solution

The fourth proportional to 1,168.63, 1,751.93 and 438.21 is: 656.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,168.63 : 1,751.93 = 438.21 : x
  2. Step 2: Convert to fraction form
    1,168.63/1,751.93 = 438.21/x
  3. Step 3: Cross multiply
    1,168.63x = 1,751.93 × 438.21
  4. Step 4: Simplify right side
    1,168.63x = 767,713.25
  5. Step 5: Solve for x
    x = 767,713.25/1,168.63
  6. Step 6: Final answer
    x = 656.93

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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.