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Finding the Fourth Proportional to 292.40, 437.28 and 260.09

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Solution

The fourth proportional to 292.40, 437.28 and 260.09 is: 388.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    292.40 : 437.28 = 260.09 : x
  2. Step 2: Convert to fraction form
    292.40/437.28 = 260.09/x
  3. Step 3: Cross multiply
    292.40x = 437.28 × 260.09
  4. Step 4: Simplify right side
    292.40x = 113,729.97
  5. Step 5: Solve for x
    x = 113,729.97/292.40
  6. Step 6: Final answer
    x = 388.96

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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.