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Finding the Fourth Proportional to 628.05, 941.40 and 384.74

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Solution

The fourth proportional to 628.05, 941.40 and 384.74 is: 576.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    628.05 : 941.40 = 384.74 : x
  2. Step 2: Convert to fraction form
    628.05/941.40 = 384.74/x
  3. Step 3: Cross multiply
    628.05x = 941.40 × 384.74
  4. Step 4: Simplify right side
    628.05x = 362,194.24
  5. Step 5: Solve for x
    x = 362,194.24/628.05
  6. Step 6: Final answer
    x = 576.70

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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.