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Finding the Fourth Proportional to 653.99, 981.41 and 243.45

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Solution

The fourth proportional to 653.99, 981.41 and 243.45 is: 365.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    653.99 : 981.41 = 243.45 : x
  2. Step 2: Convert to fraction form
    653.99/981.41 = 243.45/x
  3. Step 3: Cross multiply
    653.99x = 981.41 × 243.45
  4. Step 4: Simplify right side
    653.99x = 238,923.05
  5. Step 5: Solve for x
    x = 238,923.05/653.99
  6. Step 6: Final answer
    x = 365.33

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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.