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Finding the Fourth Proportional to 315.53, 434.70 and 300.95

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Solution

The fourth proportional to 315.53, 434.70 and 300.95 is: 414.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    315.53 : 434.70 = 300.95 : x
  2. Step 2: Convert to fraction form
    315.53/434.70 = 300.95/x
  3. Step 3: Cross multiply
    315.53x = 434.70 × 300.95
  4. Step 4: Simplify right side
    315.53x = 130,822.97
  5. Step 5: Solve for x
    x = 130,822.97/315.53
  6. Step 6: Final answer
    x = 414.61

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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.