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Finding the Fourth Proportional to 404.95, 558.75 and 281.02

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Solution

The fourth proportional to 404.95, 558.75 and 281.02 is: 387.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    404.95 : 558.75 = 281.02 : x
  2. Step 2: Convert to fraction form
    404.95/558.75 = 281.02/x
  3. Step 3: Cross multiply
    404.95x = 558.75 × 281.02
  4. Step 4: Simplify right side
    404.95x = 157,019.93
  5. Step 5: Solve for x
    x = 157,019.93/404.95
  6. Step 6: Final answer
    x = 387.75

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.