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Finding the Fourth Proportional to 545.03, 816.73 and 255.86

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Solution

The fourth proportional to 545.03, 816.73 and 255.86 is: 383.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    545.03 : 816.73 = 255.86 : x
  2. Step 2: Convert to fraction form
    545.03/816.73 = 255.86/x
  3. Step 3: Cross multiply
    545.03x = 816.73 × 255.86
  4. Step 4: Simplify right side
    545.03x = 208,968.54
  5. Step 5: Solve for x
    x = 208,968.54/545.03
  6. Step 6: Final answer
    x = 383.41

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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.