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Finding the Fourth Proportional to 315.40, 435.21 and 175.52

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Solution

The fourth proportional to 315.40, 435.21 and 175.52 is: 242.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    315.40 : 435.21 = 175.52 : x
  2. Step 2: Convert to fraction form
    315.40/435.21 = 175.52/x
  3. Step 3: Cross multiply
    315.40x = 435.21 × 175.52
  4. Step 4: Simplify right side
    315.40x = 76,389.15
  5. Step 5: Solve for x
    x = 76,389.15/315.40
  6. Step 6: Final answer
    x = 242.20

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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.