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Finding the Fourth Proportional to 304.40, 455.74 and 231.57

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Solution

The fourth proportional to 304.40, 455.74 and 231.57 is: 346.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    304.40 : 455.74 = 231.57 : x
  2. Step 2: Convert to fraction form
    304.40/455.74 = 231.57/x
  3. Step 3: Cross multiply
    304.40x = 455.74 × 231.57
  4. Step 4: Simplify right side
    304.40x = 105,535.71
  5. Step 5: Solve for x
    x = 105,535.71/304.40
  6. Step 6: Final answer
    x = 346.70

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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.