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Finding the Fourth Proportional to 628.16, 942.84 and 303.75

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Solution

The fourth proportional to 628.16, 942.84 and 303.75 is: 455.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    628.16 : 942.84 = 303.75 : x
  2. Step 2: Convert to fraction form
    628.16/942.84 = 303.75/x
  3. Step 3: Cross multiply
    628.16x = 942.84 × 303.75
  4. Step 4: Simplify right side
    628.16x = 286,387.65
  5. Step 5: Solve for x
    x = 286,387.65/628.16
  6. Step 6: Final answer
    x = 455.92

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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.