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Finding the Fourth Proportional to 312.63, 468.85 and 130.06

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Solution

The fourth proportional to 312.63, 468.85 and 130.06 is: 195.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    312.63 : 468.85 = 130.06 : x
  2. Step 2: Convert to fraction form
    312.63/468.85 = 130.06/x
  3. Step 3: Cross multiply
    312.63x = 468.85 × 130.06
  4. Step 4: Simplify right side
    312.63x = 60,978.63
  5. Step 5: Solve for x
    x = 60,978.63/312.63
  6. Step 6: Final answer
    x = 195.05

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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.