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Finding the Fourth Proportional to 287.42, 396.57 and 175.40

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Solution

The fourth proportional to 287.42, 396.57 and 175.40 is: 242.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    287.42 : 396.57 = 175.40 : x
  2. Step 2: Convert to fraction form
    287.42/396.57 = 175.40/x
  3. Step 3: Cross multiply
    287.42x = 396.57 × 175.40
  4. Step 4: Simplify right side
    287.42x = 69,558.05
  5. Step 5: Solve for x
    x = 69,558.05/287.42
  6. Step 6: Final answer
    x = 242.01

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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.