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Finding the Fourth Proportional to 1,429.63, 2,144.59 and 442.41

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Solution

The fourth proportional to 1,429.63, 2,144.59 and 442.41 is: 663.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,429.63 : 2,144.59 = 442.41 : x
  2. Step 2: Convert to fraction form
    1,429.63/2,144.59 = 442.41/x
  3. Step 3: Cross multiply
    1,429.63x = 2,144.59 × 442.41
  4. Step 4: Simplify right side
    1,429.63x = 948,782.55
  5. Step 5: Solve for x
    x = 948,782.55/1,429.63
  6. Step 6: Final answer
    x = 663.65

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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.