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Finding the Fourth Proportional to 313.12, 469.20 and 130.36

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Solution

The fourth proportional to 313.12, 469.20 and 130.36 is: 195.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    313.12 : 469.20 = 130.36 : x
  2. Step 2: Convert to fraction form
    313.12/469.20 = 130.36/x
  3. Step 3: Cross multiply
    313.12x = 469.20 × 130.36
  4. Step 4: Simplify right side
    313.12x = 61,164.91
  5. Step 5: Solve for x
    x = 61,164.91/313.12
  6. Step 6: Final answer
    x = 195.34

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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.