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Finding the Fourth Proportional to 3,070.56, 4,605.90 and 762

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Solution

The fourth proportional to 3,070.56, 4,605.90 and 762 is: 1,143.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,070.56 : 4,605.90 = 762 : x
  2. Step 2: Convert to fraction form
    3,070.56/4,605.90 = 762/x
  3. Step 3: Cross multiply
    3,070.56x = 4,605.90 × 762
  4. Step 4: Simplify right side
    3,070.56x = 3,509,695.80
  5. Step 5: Solve for x
    x = 3,509,695.80/3,070.56
  6. Step 6: Final answer
    x = 1,143.01

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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.