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Finding the Fourth Proportional to 348.16, 521.60 and 238.40

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Solution

The fourth proportional to 348.16, 521.60 and 238.40 is: 357.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    348.16 : 521.60 = 238.40 : x
  2. Step 2: Convert to fraction form
    348.16/521.60 = 238.40/x
  3. Step 3: Cross multiply
    348.16x = 521.60 × 238.40
  4. Step 4: Simplify right side
    348.16x = 124,349.44
  5. Step 5: Solve for x
    x = 124,349.44/348.16
  6. Step 6: Final answer
    x = 357.16

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.