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Finding the Fourth Proportional to 315.69, 435.64 and 175.81

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Solution

The fourth proportional to 315.69, 435.64 and 175.81 is: 242.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    315.69 : 435.64 = 175.81 : x
  2. Step 2: Convert to fraction form
    315.69/435.64 = 175.81/x
  3. Step 3: Cross multiply
    315.69x = 435.64 × 175.81
  4. Step 4: Simplify right side
    315.69x = 76,586.81
  5. Step 5: Solve for x
    x = 76,586.81/315.69
  6. Step 6: Final answer
    x = 242.60

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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.