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Finding the Fourth Proportional to 288.04, 400.26 and 285.08

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Solution

The fourth proportional to 288.04, 400.26 and 285.08 is: 396.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    288.04 : 400.26 = 285.08 : x
  2. Step 2: Convert to fraction form
    288.04/400.26 = 285.08/x
  3. Step 3: Cross multiply
    288.04x = 400.26 × 285.08
  4. Step 4: Simplify right side
    288.04x = 114,106.12
  5. Step 5: Solve for x
    x = 114,106.12/288.04
  6. Step 6: Final answer
    x = 396.15

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.