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Finding the Fourth Proportional to 452.39, 678.38 and 170.89

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Solution

The fourth proportional to 452.39, 678.38 and 170.89 is: 256.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    452.39 : 678.38 = 170.89 : x
  2. Step 2: Convert to fraction form
    452.39/678.38 = 170.89/x
  3. Step 3: Cross multiply
    452.39x = 678.38 × 170.89
  4. Step 4: Simplify right side
    452.39x = 115,925.81
  5. Step 5: Solve for x
    x = 115,925.81/452.39
  6. Step 6: Final answer
    x = 256.25

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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.