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Finding the Fourth Proportional to 319.04, 479.04 and 313.28

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Solution

The fourth proportional to 319.04, 479.04 and 313.28 is: 470.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    319.04 : 479.04 = 313.28 : x
  2. Step 2: Convert to fraction form
    319.04/479.04 = 313.28/x
  3. Step 3: Cross multiply
    319.04x = 479.04 × 313.28
  4. Step 4: Simplify right side
    319.04x = 150,073.65
  5. Step 5: Solve for x
    x = 150,073.65/319.04
  6. Step 6: Final answer
    x = 470.39

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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.