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Finding the Fourth Proportional to 1,670.94, 2,506.44 and 438.46

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Solution

The fourth proportional to 1,670.94, 2,506.44 and 438.46 is: 657.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,670.94 : 2,506.44 = 438.46 : x
  2. Step 2: Convert to fraction form
    1,670.94/2,506.44 = 438.46/x
  3. Step 3: Cross multiply
    1,670.94x = 2,506.44 × 438.46
  4. Step 4: Simplify right side
    1,670.94x = 1,098,961.15
  5. Step 5: Solve for x
    x = 1,098,961.15/1,670.94
  6. Step 6: Final answer
    x = 657.69

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.