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Finding the Fourth Proportional to 319.52, 440.16 and 221.10

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Solution

The fourth proportional to 319.52, 440.16 and 221.10 is: 304.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    319.52 : 440.16 = 221.10 : x
  2. Step 2: Convert to fraction form
    319.52/440.16 = 221.10/x
  3. Step 3: Cross multiply
    319.52x = 440.16 × 221.10
  4. Step 4: Simplify right side
    319.52x = 97,319.38
  5. Step 5: Solve for x
    x = 97,319.38/319.52
  6. Step 6: Final answer
    x = 304.58

Related Problems

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Double scale
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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.