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Finding the Fourth Proportional to 538.75, 743.43 and 317.89

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Solution

The fourth proportional to 538.75, 743.43 and 317.89 is: 438.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    538.75 : 743.43 = 317.89 : x
  2. Step 2: Convert to fraction form
    538.75/743.43 = 317.89/x
  3. Step 3: Cross multiply
    538.75x = 743.43 × 317.89
  4. Step 4: Simplify right side
    538.75x = 236,328.96
  5. Step 5: Solve for x
    x = 236,328.96/538.75
  6. Step 6: Final answer
    x = 438.66

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Find fourth proportional to 269.38, 371.72 and 158.95
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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.