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Finding the Fourth Proportional to 612.21, 918.30 and 246.99

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Solution

The fourth proportional to 612.21, 918.30 and 246.99 is: 370.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    612.21 : 918.30 = 246.99 : x
  2. Step 2: Convert to fraction form
    612.21/918.30 = 246.99/x
  3. Step 3: Cross multiply
    612.21x = 918.30 × 246.99
  4. Step 4: Simplify right side
    612.21x = 226,810.12
  5. Step 5: Solve for x
    x = 226,810.12/612.21
  6. Step 6: Final answer
    x = 370.48

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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.