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Finding the Fourth Proportional to 292.37, 438.37 and 145.79

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Solution

The fourth proportional to 292.37, 438.37 and 145.79 is: 218.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    292.37 : 438.37 = 145.79 : x
  2. Step 2: Convert to fraction form
    292.37/438.37 = 145.79/x
  3. Step 3: Cross multiply
    292.37x = 438.37 × 145.79
  4. Step 4: Simplify right side
    292.37x = 63,907.41
  5. Step 5: Solve for x
    x = 63,907.41/292.37
  6. Step 6: Final answer
    x = 218.59

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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.