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Finding the Fourth Proportional to 324.48, 483.36 and 317.28

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Solution

The fourth proportional to 324.48, 483.36 and 317.28 is: 472.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    324.48 : 483.36 = 317.28 : x
  2. Step 2: Convert to fraction form
    324.48/483.36 = 317.28/x
  3. Step 3: Cross multiply
    324.48x = 483.36 × 317.28
  4. Step 4: Simplify right side
    324.48x = 153,360.46
  5. Step 5: Solve for x
    x = 153,360.46/324.48
  6. Step 6: Final answer
    x = 472.63

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.