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Finding the Fourth Proportional to 313.42, 469.93 and 105.16

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Solution

The fourth proportional to 313.42, 469.93 and 105.16 is: 157.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    313.42 : 469.93 = 105.16 : x
  2. Step 2: Convert to fraction form
    313.42/469.93 = 105.16/x
  3. Step 3: Cross multiply
    313.42x = 469.93 × 105.16
  4. Step 4: Simplify right side
    313.42x = 49,417.84
  5. Step 5: Solve for x
    x = 49,417.84/313.42
  6. Step 6: Final answer
    x = 157.67

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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.