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Finding the Fourth Proportional to 298.86, 450.04 and 260.80

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Solution

The fourth proportional to 298.86, 450.04 and 260.80 is: 392.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    298.86 : 450.04 = 260.80 : x
  2. Step 2: Convert to fraction form
    298.86/450.04 = 260.80/x
  3. Step 3: Cross multiply
    298.86x = 450.04 × 260.80
  4. Step 4: Simplify right side
    298.86x = 117,368.65
  5. Step 5: Solve for x
    x = 117,368.65/298.86
  6. Step 6: Final answer
    x = 392.72

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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.