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Finding the Fourth Proportional to 404.93, 608.40 and 258.75

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Solution

The fourth proportional to 404.93, 608.40 and 258.75 is: 388.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    404.93 : 608.40 = 258.75 : x
  2. Step 2: Convert to fraction form
    404.93/608.40 = 258.75/x
  3. Step 3: Cross multiply
    404.93x = 608.40 × 258.75
  4. Step 4: Simplify right side
    404.93x = 157,423.50
  5. Step 5: Solve for x
    x = 157,423.50/404.93
  6. Step 6: Final answer
    x = 388.77

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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.