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Finding the Fourth Proportional to 298.19, 448.94 and 258.50

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Solution

The fourth proportional to 298.19, 448.94 and 258.50 is: 389.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    298.19 : 448.94 = 258.50 : x
  2. Step 2: Convert to fraction form
    298.19/448.94 = 258.50/x
  3. Step 3: Cross multiply
    298.19x = 448.94 × 258.50
  4. Step 4: Simplify right side
    298.19x = 116,050.99
  5. Step 5: Solve for x
    x = 116,050.99/298.19
  6. Step 6: Final answer
    x = 389.18

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.