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Finding the Fourth Proportional to 612.94, 919.40 and 222.99

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Solution

The fourth proportional to 612.94, 919.40 and 222.99 is: 334.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    612.94 : 919.40 = 222.99 : x
  2. Step 2: Convert to fraction form
    612.94/919.40 = 222.99/x
  3. Step 3: Cross multiply
    612.94x = 919.40 × 222.99
  4. Step 4: Simplify right side
    612.94x = 205,012.41
  5. Step 5: Solve for x
    x = 205,012.41/612.94
  6. Step 6: Final answer
    x = 334.48

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Double scale
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Similar ratio
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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.