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Finding the Fourth Proportional to 645.83, 968.74 and 235.08

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Solution

The fourth proportional to 645.83, 968.74 and 235.08 is: 352.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    645.83 : 968.74 = 235.08 : x
  2. Step 2: Convert to fraction form
    645.83/968.74 = 235.08/x
  3. Step 3: Cross multiply
    645.83x = 968.74 × 235.08
  4. Step 4: Simplify right side
    645.83x = 227,730.81
  5. Step 5: Solve for x
    x = 227,730.81/645.83
  6. Step 6: Final answer
    x = 352.62

Related Problems

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Double scale
Find fourth proportional to 646.83, 970.24 and 236.08
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.