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Finding the Fourth Proportional to 1,605.17, 2,407.76 and 739.49

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Solution

The fourth proportional to 1,605.17, 2,407.76 and 739.49 is: 1,109.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,605.17 : 2,407.76 = 739.49 : x
  2. Step 2: Convert to fraction form
    1,605.17/2,407.76 = 739.49/x
  3. Step 3: Cross multiply
    1,605.17x = 2,407.76 × 739.49
  4. Step 4: Simplify right side
    1,605.17x = 1,780,514.44
  5. Step 5: Solve for x
    x = 1,780,514.44/1,605.17
  6. Step 6: Final answer
    x = 1,109.24

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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.