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Finding the Fourth Proportional to 612.89, 919.44 and 339.25

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Solution

The fourth proportional to 612.89, 919.44 and 339.25 is: 508.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    612.89 : 919.44 = 339.25 : x
  2. Step 2: Convert to fraction form
    612.89/919.44 = 339.25/x
  3. Step 3: Cross multiply
    612.89x = 919.44 × 339.25
  4. Step 4: Simplify right side
    612.89x = 311,917.72
  5. Step 5: Solve for x
    x = 311,917.72/612.89
  6. Step 6: Final answer
    x = 508.93

Related Problems

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Half scale
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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.