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Finding the Fourth Proportional to 479.79, 662.31 and 339.93

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Solution

The fourth proportional to 479.79, 662.31 and 339.93 is: 469.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    479.79 : 662.31 = 339.93 : x
  2. Step 2: Convert to fraction form
    479.79/662.31 = 339.93/x
  3. Step 3: Cross multiply
    479.79x = 662.31 × 339.93
  4. Step 4: Simplify right side
    479.79x = 225,139.04
  5. Step 5: Solve for x
    x = 225,139.04/479.79
  6. Step 6: Final answer
    x = 469.24

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