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Finding the Fourth Proportional to 984.95, 1,477.26 and 254.50

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Solution

The fourth proportional to 984.95, 1,477.26 and 254.50 is: 381.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    984.95 : 1,477.26 = 254.50 : x
  2. Step 2: Convert to fraction form
    984.95/1,477.26 = 254.50/x
  3. Step 3: Cross multiply
    984.95x = 1,477.26 × 254.50
  4. Step 4: Simplify right side
    984.95x = 375,962.67
  5. Step 5: Solve for x
    x = 375,962.67/984.95
  6. Step 6: Final answer
    x = 381.71

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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.