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Finding the Fourth Proportional to 612.50, 918.87 and 201.67

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Solution

The fourth proportional to 612.50, 918.87 and 201.67 is: 302.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    612.50 : 918.87 = 201.67 : x
  2. Step 2: Convert to fraction form
    612.50/918.87 = 201.67/x
  3. Step 3: Cross multiply
    612.50x = 918.87 × 201.67
  4. Step 4: Simplify right side
    612.50x = 185,308.51
  5. Step 5: Solve for x
    x = 185,308.51/612.50
  6. Step 6: Final answer
    x = 302.54

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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.