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Finding the Fourth Proportional to 1,605.12, 2,406.77 and 630.69

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Solution

The fourth proportional to 1,605.12, 2,406.77 and 630.69 is: 945.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,605.12 : 2,406.77 = 630.69 : x
  2. Step 2: Convert to fraction form
    1,605.12/2,406.77 = 630.69/x
  3. Step 3: Cross multiply
    1,605.12x = 2,406.77 × 630.69
  4. Step 4: Simplify right side
    1,605.12x = 1,517,922.62
  5. Step 5: Solve for x
    x = 1,517,922.62/1,605.12
  6. Step 6: Final answer
    x = 945.68

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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.