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Finding the Fourth Proportional to 1,002.17, 1,382.94 and 609.18

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Solution

The fourth proportional to 1,002.17, 1,382.94 and 609.18 is: 840.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,002.17 : 1,382.94 = 609.18 : x
  2. Step 2: Convert to fraction form
    1,002.17/1,382.94 = 609.18/x
  3. Step 3: Cross multiply
    1,002.17x = 1,382.94 × 609.18
  4. Step 4: Simplify right side
    1,002.17x = 842,459.39
  5. Step 5: Solve for x
    x = 842,459.39/1,002.17
  6. Step 6: Final answer
    x = 840.64

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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.