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Finding the Fourth Proportional to 489.98, 734.61 and 212.01

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Solution

The fourth proportional to 489.98, 734.61 and 212.01 is: 317.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    489.98 : 734.61 = 212.01 : x
  2. Step 2: Convert to fraction form
    489.98/734.61 = 212.01/x
  3. Step 3: Cross multiply
    489.98x = 734.61 × 212.01
  4. Step 4: Simplify right side
    489.98x = 155,744.67
  5. Step 5: Solve for x
    x = 155,744.67/489.98
  6. Step 6: Final answer
    x = 317.86

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.