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Finding the Fourth Proportional to 628.07, 942.72 and 385.07

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Solution

The fourth proportional to 628.07, 942.72 and 385.07 is: 577.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    628.07 : 942.72 = 385.07 : x
  2. Step 2: Convert to fraction form
    628.07/942.72 = 385.07/x
  3. Step 3: Cross multiply
    628.07x = 942.72 × 385.07
  4. Step 4: Simplify right side
    628.07x = 363,011.27
  5. Step 5: Solve for x
    x = 363,011.27/628.07
  6. Step 6: Final answer
    x = 577.98

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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.