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Finding the Fourth Proportional to 760.91, 1,141.40 and 298.65

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Solution

The fourth proportional to 760.91, 1,141.40 and 298.65 is: 447.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    760.91 : 1,141.40 = 298.65 : x
  2. Step 2: Convert to fraction form
    760.91/1,141.40 = 298.65/x
  3. Step 3: Cross multiply
    760.91x = 1,141.40 × 298.65
  4. Step 4: Simplify right side
    760.91x = 340,879.86
  5. Step 5: Solve for x
    x = 340,879.86/760.91
  6. Step 6: Final answer
    x = 447.99

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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.