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Finding the Fourth Proportional to 174.32, 260.88 and 172.40

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Solution

The fourth proportional to 174.32, 260.88 and 172.40 is: 258.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    174.32 : 260.88 = 172.40 : x
  2. Step 2: Convert to fraction form
    174.32/260.88 = 172.40/x
  3. Step 3: Cross multiply
    174.32x = 260.88 × 172.40
  4. Step 4: Simplify right side
    174.32x = 44,975.71
  5. Step 5: Solve for x
    x = 44,975.71/174.32
  6. Step 6: Final answer
    x = 258.01

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.