Home / 1,664.39-2,496.73-431.79

Finding the Fourth Proportional to 1,664.39, 2,496.73 and 431.79

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Solution

The fourth proportional to 1,664.39, 2,496.73 and 431.79 is: 647.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,664.39 : 2,496.73 = 431.79 : x
  2. Step 2: Convert to fraction form
    1,664.39/2,496.73 = 431.79/x
  3. Step 3: Cross multiply
    1,664.39x = 2,496.73 × 431.79
  4. Step 4: Simplify right side
    1,664.39x = 1,078,061.97
  5. Step 5: Solve for x
    x = 1,078,061.97/1,664.39
  6. Step 6: Final answer
    x = 647.72

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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.