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Finding the Fourth Proportional to 612.25, 918.57 and 304.31

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Solution

The fourth proportional to 612.25, 918.57 and 304.31 is: 456.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    612.25 : 918.57 = 304.31 : x
  2. Step 2: Convert to fraction form
    612.25/918.57 = 304.31/x
  3. Step 3: Cross multiply
    612.25x = 918.57 × 304.31
  4. Step 4: Simplify right side
    612.25x = 279,530.04
  5. Step 5: Solve for x
    x = 279,530.04/612.25
  6. Step 6: Final answer
    x = 456.56

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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.