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Finding the Fourth Proportional to 313.98, 470.98 and 149.60

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Solution

The fourth proportional to 313.98, 470.98 and 149.60 is: 224.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    313.98 : 470.98 = 149.60 : x
  2. Step 2: Convert to fraction form
    313.98/470.98 = 149.60/x
  3. Step 3: Cross multiply
    313.98x = 470.98 × 149.60
  4. Step 4: Simplify right side
    313.98x = 70,457.32
  5. Step 5: Solve for x
    x = 70,457.32/313.98
  6. Step 6: Final answer
    x = 224.40

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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.