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Finding the Fourth Proportional to 392.42, 541.40 and 245.00

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Solution

The fourth proportional to 392.42, 541.40 and 245.00 is: 338.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    392.42 : 541.40 = 245.00 : x
  2. Step 2: Convert to fraction form
    392.42/541.40 = 245.00/x
  3. Step 3: Cross multiply
    392.42x = 541.40 × 245.00
  4. Step 4: Simplify right side
    392.42x = 132,639.07
  5. Step 5: Solve for x
    x = 132,639.07/392.42
  6. Step 6: Final answer
    x = 338.01

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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.