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Finding the Fourth Proportional to 609.84, 914.85 and 285.18

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Solution

The fourth proportional to 609.84, 914.85 and 285.18 is: 427.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    609.84 : 914.85 = 285.18 : x
  2. Step 2: Convert to fraction form
    609.84/914.85 = 285.18/x
  3. Step 3: Cross multiply
    609.84x = 914.85 × 285.18
  4. Step 4: Simplify right side
    609.84x = 260,896.92
  5. Step 5: Solve for x
    x = 260,896.92/609.84
  6. Step 6: Final answer
    x = 427.81

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1.5x scale

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.