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Finding the Fourth Proportional to 612.50, 918.81 and 201.69

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Solution

The fourth proportional to 612.50, 918.81 and 201.69 is: 302.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    612.50 : 918.81 = 201.69 : x
  2. Step 2: Convert to fraction form
    612.50/918.81 = 201.69/x
  3. Step 3: Cross multiply
    612.50x = 918.81 × 201.69
  4. Step 4: Simplify right side
    612.50x = 185,314.79
  5. Step 5: Solve for x
    x = 185,314.79/612.50
  6. Step 6: Final answer
    x = 302.56

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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.