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Finding the Fourth Proportional to 1,002.62, 1,382.32 and 670.79

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Solution

The fourth proportional to 1,002.62, 1,382.32 and 670.79 is: 924.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,002.62 : 1,382.32 = 670.79 : x
  2. Step 2: Convert to fraction form
    1,002.62/1,382.32 = 670.79/x
  3. Step 3: Cross multiply
    1,002.62x = 1,382.32 × 670.79
  4. Step 4: Simplify right side
    1,002.62x = 927,246.43
  5. Step 5: Solve for x
    x = 927,246.43/1,002.62
  6. Step 6: Final answer
    x = 924.82

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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.