Home / 1,417.20-2,125.72-443.28

Finding the Fourth Proportional to 1,417.20, 2,125.72 and 443.28

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Solution

The fourth proportional to 1,417.20, 2,125.72 and 443.28 is: 664.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,417.20 : 2,125.72 = 443.28 : x
  2. Step 2: Convert to fraction form
    1,417.20/2,125.72 = 443.28/x
  3. Step 3: Cross multiply
    1,417.20x = 2,125.72 × 443.28
  4. Step 4: Simplify right side
    1,417.20x = 942,289.16
  5. Step 5: Solve for x
    x = 942,289.16/1,417.20
  6. Step 6: Final answer
    x = 664.89

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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.