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Finding the Fourth Proportional to 689.08, 950.88 and 455.80

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Solution

The fourth proportional to 689.08, 950.88 and 455.80 is: 628.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    689.08 : 950.88 = 455.80 : x
  2. Step 2: Convert to fraction form
    689.08/950.88 = 455.80/x
  3. Step 3: Cross multiply
    689.08x = 950.88 × 455.80
  4. Step 4: Simplify right side
    689.08x = 433,411.10
  5. Step 5: Solve for x
    x = 433,411.10/689.08
  6. Step 6: Final answer
    x = 628.97

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.