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Finding the Fourth Proportional to 649.62, 975.87 and 505.62

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Solution

The fourth proportional to 649.62, 975.87 and 505.62 is: 759.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    649.62 : 975.87 = 505.62 : x
  2. Step 2: Convert to fraction form
    649.62/975.87 = 505.62/x
  3. Step 3: Cross multiply
    649.62x = 975.87 × 505.62
  4. Step 4: Simplify right side
    649.62x = 493,419.39
  5. Step 5: Solve for x
    x = 493,419.39/649.62
  6. Step 6: Final answer
    x = 759.55

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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.