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Finding the Fourth Proportional to 452.39, 678.58 and 259.88

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Solution

The fourth proportional to 452.39, 678.58 and 259.88 is: 389.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    452.39 : 678.58 = 259.88 : x
  2. Step 2: Convert to fraction form
    452.39/678.58 = 259.88/x
  3. Step 3: Cross multiply
    452.39x = 678.58 × 259.88
  4. Step 4: Simplify right side
    452.39x = 176,345.33
  5. Step 5: Solve for x
    x = 176,345.33/452.39
  6. Step 6: Final answer
    x = 389.81

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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.