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Finding the Fourth Proportional to 630.50, 945.66 and 197.65

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Solution

The fourth proportional to 630.50, 945.66 and 197.65 is: 296.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    630.50 : 945.66 = 197.65 : x
  2. Step 2: Convert to fraction form
    630.50/945.66 = 197.65/x
  3. Step 3: Cross multiply
    630.50x = 945.66 × 197.65
  4. Step 4: Simplify right side
    630.50x = 186,907.33
  5. Step 5: Solve for x
    x = 186,907.33/630.50
  6. Step 6: Final answer
    x = 296.45

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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.