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Finding the Fourth Proportional to 959.44, 1,438.80 and 310

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Solution

The fourth proportional to 959.44, 1,438.80 and 310 is: 464.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    959.44 : 1,438.80 = 310 : x
  2. Step 2: Convert to fraction form
    959.44/1,438.80 = 310/x
  3. Step 3: Cross multiply
    959.44x = 1,438.80 × 310
  4. Step 4: Simplify right side
    959.44x = 446,028
  5. Step 5: Solve for x
    x = 446,028/959.44
  6. Step 6: Final answer
    x = 464.88

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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.