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Finding the Fourth Proportional to 656.40, 984.06 and 327.18

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Solution

The fourth proportional to 656.40, 984.06 and 327.18 is: 490.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    656.40 : 984.06 = 327.18 : x
  2. Step 2: Convert to fraction form
    656.40/984.06 = 327.18/x
  3. Step 3: Cross multiply
    656.40x = 984.06 × 327.18
  4. Step 4: Simplify right side
    656.40x = 321,964.75
  5. Step 5: Solve for x
    x = 321,964.75/656.40
  6. Step 6: Final answer
    x = 490.50

Related Problems

Find fourth proportional to 328.20, 492.03 and 163.59
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.