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Finding the Fourth Proportional to 354.84, 489.76 and 250

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Solution

The fourth proportional to 354.84, 489.76 and 250 is: 345.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    354.84 : 489.76 = 250 : x
  2. Step 2: Convert to fraction form
    354.84/489.76 = 250/x
  3. Step 3: Cross multiply
    354.84x = 489.76 × 250
  4. Step 4: Simplify right side
    354.84x = 122,440
  5. Step 5: Solve for x
    x = 122,440/354.84
  6. Step 6: Final answer
    x = 345.06

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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.