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Finding the Fourth Proportional to 348.08, 479.75 and 318.65

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Solution

The fourth proportional to 348.08, 479.75 and 318.65 is: 439.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    348.08 : 479.75 = 318.65 : x
  2. Step 2: Convert to fraction form
    348.08/479.75 = 318.65/x
  3. Step 3: Cross multiply
    348.08x = 479.75 × 318.65
  4. Step 4: Simplify right side
    348.08x = 152,870.74
  5. Step 5: Solve for x
    x = 152,870.74/348.08
  6. Step 6: Final answer
    x = 439.19

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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.