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Finding the Fourth Proportional to 1,417.15, 2,126 and 443.26

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Solution

The fourth proportional to 1,417.15, 2,126 and 443.26 is: 664.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,417.15 : 2,126 = 443.26 : x
  2. Step 2: Convert to fraction form
    1,417.15/2,126 = 443.26/x
  3. Step 3: Cross multiply
    1,417.15x = 2,126 × 443.26
  4. Step 4: Simplify right side
    1,417.15x = 942,370.76
  5. Step 5: Solve for x
    x = 942,370.76/1,417.15
  6. Step 6: Final answer
    x = 664.98

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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.