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Finding the Fourth Proportional to 319.14, 478.80 and 165.02

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Solution

The fourth proportional to 319.14, 478.80 and 165.02 is: 247.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    319.14 : 478.80 = 165.02 : x
  2. Step 2: Convert to fraction form
    319.14/478.80 = 165.02/x
  3. Step 3: Cross multiply
    319.14x = 478.80 × 165.02
  4. Step 4: Simplify right side
    319.14x = 79,009.18
  5. Step 5: Solve for x
    x = 79,009.18/319.14
  6. Step 6: Final answer
    x = 247.57

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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.