Home / 1,002.20-1,382.74-609.35

Finding the Fourth Proportional to 1,002.20, 1,382.74 and 609.35

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Solution

The fourth proportional to 1,002.20, 1,382.74 and 609.35 is: 840.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,002.20 : 1,382.74 = 609.35 : x
  2. Step 2: Convert to fraction form
    1,002.20/1,382.74 = 609.35/x
  3. Step 3: Cross multiply
    1,002.20x = 1,382.74 × 609.35
  4. Step 4: Simplify right side
    1,002.20x = 842,564.18
  5. Step 5: Solve for x
    x = 842,564.18/1,002.20
  6. Step 6: Final answer
    x = 840.72

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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.