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Finding the Fourth Proportional to 1,559.73, 2,339.64 and 405.48

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Solution

The fourth proportional to 1,559.73, 2,339.64 and 405.48 is: 608.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,559.73 : 2,339.64 = 405.48 : x
  2. Step 2: Convert to fraction form
    1,559.73/2,339.64 = 405.48/x
  3. Step 3: Cross multiply
    1,559.73x = 2,339.64 × 405.48
  4. Step 4: Simplify right side
    1,559.73x = 948,677.23
  5. Step 5: Solve for x
    x = 948,677.23/1,559.73
  6. Step 6: Final answer
    x = 608.23

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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.