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Finding the Fourth Proportional to 1,636.52, 2,455.38 and 770.63

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Solution

The fourth proportional to 1,636.52, 2,455.38 and 770.63 is: 1,156.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,636.52 : 2,455.38 = 770.63 : x
  2. Step 2: Convert to fraction form
    1,636.52/2,455.38 = 770.63/x
  3. Step 3: Cross multiply
    1,636.52x = 2,455.38 × 770.63
  4. Step 4: Simplify right side
    1,636.52x = 1,892,177.21
  5. Step 5: Solve for x
    x = 1,892,177.21/1,636.52
  6. Step 6: Final answer
    x = 1,156.22

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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.