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Finding the Fourth Proportional to 743.07, 1,114.76 and 255.99

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Solution

The fourth proportional to 743.07, 1,114.76 and 255.99 is: 384.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    743.07 : 1,114.76 = 255.99 : x
  2. Step 2: Convert to fraction form
    743.07/1,114.76 = 255.99/x
  3. Step 3: Cross multiply
    743.07x = 1,114.76 × 255.99
  4. Step 4: Simplify right side
    743.07x = 285,367.41
  5. Step 5: Solve for x
    x = 285,367.41/743.07
  6. Step 6: Final answer
    x = 384.04

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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.