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Finding the Fourth Proportional to 628.83, 943.29 and 355.05

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Solution

The fourth proportional to 628.83, 943.29 and 355.05 is: 532.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    628.83 : 943.29 = 355.05 : x
  2. Step 2: Convert to fraction form
    628.83/943.29 = 355.05/x
  3. Step 3: Cross multiply
    628.83x = 943.29 × 355.05
  4. Step 4: Simplify right side
    628.83x = 334,915.11
  5. Step 5: Solve for x
    x = 334,915.11/628.83
  6. Step 6: Final answer
    x = 532.60

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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.