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Finding the Fourth Proportional to 645.99, 968.77 and 235.05

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Solution

The fourth proportional to 645.99, 968.77 and 235.05 is: 352.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    645.99 : 968.77 = 235.05 : x
  2. Step 2: Convert to fraction form
    645.99/968.77 = 235.05/x
  3. Step 3: Cross multiply
    645.99x = 968.77 × 235.05
  4. Step 4: Simplify right side
    645.99x = 227,709.39
  5. Step 5: Solve for x
    x = 227,709.39/645.99
  6. Step 6: Final answer
    x = 352.50

Related Problems

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Half scale
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Double scale
Find fourth proportional to 646.99, 970.27 and 236.05
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.