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Finding the Fourth Proportional to 319.44, 478.65 and 307.44

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Solution

The fourth proportional to 319.44, 478.65 and 307.44 is: 460.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    319.44 : 478.65 = 307.44 : x
  2. Step 2: Convert to fraction form
    319.44/478.65 = 307.44/x
  3. Step 3: Cross multiply
    319.44x = 478.65 × 307.44
  4. Step 4: Simplify right side
    319.44x = 147,156.16
  5. Step 5: Solve for x
    x = 147,156.16/319.44
  6. Step 6: Final answer
    x = 460.67

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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.