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Finding the Fourth Proportional to 648.72, 973.44 and 324.36

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Solution

The fourth proportional to 648.72, 973.44 and 324.36 is: 486.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    648.72 : 973.44 = 324.36 : x
  2. Step 2: Convert to fraction form
    648.72/973.44 = 324.36/x
  3. Step 3: Cross multiply
    648.72x = 973.44 × 324.36
  4. Step 4: Simplify right side
    648.72x = 315,745.00
  5. Step 5: Solve for x
    x = 315,745.00/648.72
  6. Step 6: Final answer
    x = 486.72

Related Problems

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Half scale
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Double scale
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Similar ratio
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1.5x scale

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.