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Finding the Fourth Proportional to 657.62, 986.79 and 247.02

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Solution

The fourth proportional to 657.62, 986.79 and 247.02 is: 370.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    657.62 : 986.79 = 247.02 : x
  2. Step 2: Convert to fraction form
    657.62/986.79 = 247.02/x
  3. Step 3: Cross multiply
    657.62x = 986.79 × 247.02
  4. Step 4: Simplify right side
    657.62x = 243,756.87
  5. Step 5: Solve for x
    x = 243,756.87/657.62
  6. Step 6: Final answer
    x = 370.67

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Double scale
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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.