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Finding the Fourth Proportional to 1,699.45, 2,339.21 and 1,256.58

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Solution

The fourth proportional to 1,699.45, 2,339.21 and 1,256.58 is: 1,729.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,699.45 : 2,339.21 = 1,256.58 : x
  2. Step 2: Convert to fraction form
    1,699.45/2,339.21 = 1,256.58/x
  3. Step 3: Cross multiply
    1,699.45x = 2,339.21 × 1,256.58
  4. Step 4: Simplify right side
    1,699.45x = 2,939,407.64
  5. Step 5: Solve for x
    x = 2,939,407.64/1,699.45
  6. Step 6: Final answer
    x = 1,729.63

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.