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Finding the Fourth Proportional to 293.68, 439.50 and 257.20

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Solution

The fourth proportional to 293.68, 439.50 and 257.20 is: 384.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    293.68 : 439.50 = 257.20 : x
  2. Step 2: Convert to fraction form
    293.68/439.50 = 257.20/x
  3. Step 3: Cross multiply
    293.68x = 439.50 × 257.20
  4. Step 4: Simplify right side
    293.68x = 113,039.40
  5. Step 5: Solve for x
    x = 113,039.40/293.68
  6. Step 6: Final answer
    x = 384.91

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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.