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Finding the Fourth Proportional to 630.59, 945.90 and 197.78

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Solution

The fourth proportional to 630.59, 945.90 and 197.78 is: 296.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    630.59 : 945.90 = 197.78 : x
  2. Step 2: Convert to fraction form
    630.59/945.90 = 197.78/x
  3. Step 3: Cross multiply
    630.59x = 945.90 × 197.78
  4. Step 4: Simplify right side
    630.59x = 187,075.37
  5. Step 5: Solve for x
    x = 187,075.37/630.59
  6. Step 6: Final answer
    x = 296.67

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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.