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Finding the Fourth Proportional to 689.18, 951.57 and 468.05

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Solution

The fourth proportional to 689.18, 951.57 and 468.05 is: 646.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    689.18 : 951.57 = 468.05 : x
  2. Step 2: Convert to fraction form
    689.18/951.57 = 468.05/x
  3. Step 3: Cross multiply
    689.18x = 951.57 × 468.05
  4. Step 4: Simplify right side
    689.18x = 445,377.58
  5. Step 5: Solve for x
    x = 445,377.58/689.18
  6. Step 6: Final answer
    x = 646.25

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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.