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Finding the Fourth Proportional to 480, 662.48 and 313.92

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Solution

The fourth proportional to 480, 662.48 and 313.92 is: 433.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    480 : 662.48 = 313.92 : x
  2. Step 2: Convert to fraction form
    480/662.48 = 313.92/x
  3. Step 3: Cross multiply
    480x = 662.48 × 313.92
  4. Step 4: Simplify right side
    480x = 207,965.72
  5. Step 5: Solve for x
    x = 207,965.72/480
  6. Step 6: Final answer
    x = 433.26

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.