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Finding the Fourth Proportional to 628.79, 943.13 and 282.15

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Solution

The fourth proportional to 628.79, 943.13 and 282.15 is: 423.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    628.79 : 943.13 = 282.15 : x
  2. Step 2: Convert to fraction form
    628.79/943.13 = 282.15/x
  3. Step 3: Cross multiply
    628.79x = 943.13 × 282.15
  4. Step 4: Simplify right side
    628.79x = 266,102.72
  5. Step 5: Solve for x
    x = 266,102.72/628.79
  6. Step 6: Final answer
    x = 423.20

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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.