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Finding the Fourth Proportional to 648.99, 973.62 and 216.18

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Solution

The fourth proportional to 648.99, 973.62 and 216.18 is: 324.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    648.99 : 973.62 = 216.18 : x
  2. Step 2: Convert to fraction form
    648.99/973.62 = 216.18/x
  3. Step 3: Cross multiply
    648.99x = 973.62 × 216.18
  4. Step 4: Simplify right side
    648.99x = 210,477.17
  5. Step 5: Solve for x
    x = 210,477.17/648.99
  6. Step 6: Final answer
    x = 324.31

Related Problems

Find fourth proportional to 324.50, 486.81 and 108.09
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.