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Finding the Fourth Proportional to 1,690.62, 2,333.07 and 944.65

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Solution

The fourth proportional to 1,690.62, 2,333.07 and 944.65 is: 1,303.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,690.62 : 2,333.07 = 944.65 : x
  2. Step 2: Convert to fraction form
    1,690.62/2,333.07 = 944.65/x
  3. Step 3: Cross multiply
    1,690.62x = 2,333.07 × 944.65
  4. Step 4: Simplify right side
    1,690.62x = 2,203,918.19
  5. Step 5: Solve for x
    x = 2,203,918.19/1,690.62
  6. Step 6: Final answer
    x = 1,303.62

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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.