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Finding the Fourth Proportional to 1,690.61, 2,332.90 and 944.49

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Solution

The fourth proportional to 1,690.61, 2,332.90 and 944.49 is: 1,303.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,690.61 : 2,332.90 = 944.49 : x
  2. Step 2: Convert to fraction form
    1,690.61/2,332.90 = 944.49/x
  3. Step 3: Cross multiply
    1,690.61x = 2,332.90 × 944.49
  4. Step 4: Simplify right side
    1,690.61x = 2,203,410.65
  5. Step 5: Solve for x
    x = 2,203,410.65/1,690.61
  6. Step 6: Final answer
    x = 1,303.33

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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.