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Finding the Fourth Proportional to 1,729.63, 2,594.46 and 431.09

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Solution

The fourth proportional to 1,729.63, 2,594.46 and 431.09 is: 646.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,729.63 : 2,594.46 = 431.09 : x
  2. Step 2: Convert to fraction form
    1,729.63/2,594.46 = 431.09/x
  3. Step 3: Cross multiply
    1,729.63x = 2,594.46 × 431.09
  4. Step 4: Simplify right side
    1,729.63x = 1,118,443.61
  5. Step 5: Solve for x
    x = 1,118,443.61/1,729.63
  6. Step 6: Final answer
    x = 646.64

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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.