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Finding the Fourth Proportional to 491.58, 677.99 and 325.64

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Solution

The fourth proportional to 491.58, 677.99 and 325.64 is: 449.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    491.58 : 677.99 = 325.64 : x
  2. Step 2: Convert to fraction form
    491.58/677.99 = 325.64/x
  3. Step 3: Cross multiply
    491.58x = 677.99 × 325.64
  4. Step 4: Simplify right side
    491.58x = 220,775.65
  5. Step 5: Solve for x
    x = 220,775.65/491.58
  6. Step 6: Final answer
    x = 449.11

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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.