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Finding the Fourth Proportional to 356.65, 491.67 and 245.95

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Solution

The fourth proportional to 356.65, 491.67 and 245.95 is: 339.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    356.65 : 491.67 = 245.95 : x
  2. Step 2: Convert to fraction form
    356.65/491.67 = 245.95/x
  3. Step 3: Cross multiply
    356.65x = 491.67 × 245.95
  4. Step 4: Simplify right side
    356.65x = 120,926.24
  5. Step 5: Solve for x
    x = 120,926.24/356.65
  6. Step 6: Final answer
    x = 339.06

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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.