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Finding the Fourth Proportional to 315.22, 435.21 and 237.70

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Solution

The fourth proportional to 315.22, 435.21 and 237.70 is: 328.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    315.22 : 435.21 = 237.70 : x
  2. Step 2: Convert to fraction form
    315.22/435.21 = 237.70/x
  3. Step 3: Cross multiply
    315.22x = 435.21 × 237.70
  4. Step 4: Simplify right side
    315.22x = 103,449.42
  5. Step 5: Solve for x
    x = 103,449.42/315.22
  6. Step 6: Final answer
    x = 328.18

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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.