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Finding the Fourth Proportional to 313.92, 464.40 and 313.92

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Solution

The fourth proportional to 313.92, 464.40 and 313.92 is: 464.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    313.92 : 464.40 = 313.92 : x
  2. Step 2: Convert to fraction form
    313.92/464.40 = 313.92/x
  3. Step 3: Cross multiply
    313.92x = 464.40 × 313.92
  4. Step 4: Simplify right side
    313.92x = 145,784.45
  5. Step 5: Solve for x
    x = 145,784.45/313.92
  6. Step 6: Final answer
    x = 464.40

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Why These Related Problems?

These problems maintain the same ratio (1.48) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.