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Finding the Fourth Proportional to 489.95, 735.38 and 336.86

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Solution

The fourth proportional to 489.95, 735.38 and 336.86 is: 505.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    489.95 : 735.38 = 336.86 : x
  2. Step 2: Convert to fraction form
    489.95/735.38 = 336.86/x
  3. Step 3: Cross multiply
    489.95x = 735.38 × 336.86
  4. Step 4: Simplify right side
    489.95x = 247,718.77
  5. Step 5: Solve for x
    x = 247,718.77/489.95
  6. Step 6: Final answer
    x = 505.60

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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.