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Finding the Fourth Proportional to 330.75, 456.54 and 243.68

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Solution

The fourth proportional to 330.75, 456.54 and 243.68 is: 336.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    330.75 : 456.54 = 243.68 : x
  2. Step 2: Convert to fraction form
    330.75/456.54 = 243.68/x
  3. Step 3: Cross multiply
    330.75x = 456.54 × 243.68
  4. Step 4: Simplify right side
    330.75x = 111,246.47
  5. Step 5: Solve for x
    x = 111,246.47/330.75
  6. Step 6: Final answer
    x = 336.35

Related Problems

Find fourth proportional to 165.38, 228.27 and 121.84
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 (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.