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Finding the Fourth Proportional to 404.73, 607.30 and 258.53

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Solution

The fourth proportional to 404.73, 607.30 and 258.53 is: 387.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    404.73 : 607.30 = 258.53 : x
  2. Step 2: Convert to fraction form
    404.73/607.30 = 258.53/x
  3. Step 3: Cross multiply
    404.73x = 607.30 × 258.53
  4. Step 4: Simplify right side
    404.73x = 157,001.59
  5. Step 5: Solve for x
    x = 157,001.59/404.73
  6. Step 6: Final answer
    x = 387.92

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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.