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Finding the Fourth Proportional to 628.86, 944.46 and 558.30

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Solution

The fourth proportional to 628.86, 944.46 and 558.30 is: 838.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    628.86 : 944.46 = 558.30 : x
  2. Step 2: Convert to fraction form
    628.86/944.46 = 558.30/x
  3. Step 3: Cross multiply
    628.86x = 944.46 × 558.30
  4. Step 4: Simplify right side
    628.86x = 527,292.02
  5. Step 5: Solve for x
    x = 527,292.02/628.86
  6. Step 6: Final answer
    x = 838.49

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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.