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Finding the Fourth Proportional to 443.36, 612.08 and 288.16

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Solution

The fourth proportional to 443.36, 612.08 and 288.16 is: 397.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    443.36 : 612.08 = 288.16 : x
  2. Step 2: Convert to fraction form
    443.36/612.08 = 288.16/x
  3. Step 3: Cross multiply
    443.36x = 612.08 × 288.16
  4. Step 4: Simplify right side
    443.36x = 176,376.97
  5. Step 5: Solve for x
    x = 176,376.97/443.36
  6. Step 6: Final answer
    x = 397.82

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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.