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Finding the Fourth Proportional to 315.62, 435.40 and 271.88

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Solution

The fourth proportional to 315.62, 435.40 and 271.88 is: 375.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    315.62 : 435.40 = 271.88 : x
  2. Step 2: Convert to fraction form
    315.62/435.40 = 271.88/x
  3. Step 3: Cross multiply
    315.62x = 435.40 × 271.88
  4. Step 4: Simplify right side
    315.62x = 118,373.70
  5. Step 5: Solve for x
    x = 118,373.70/315.62
  6. Step 6: Final answer
    x = 375.06

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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.