Home / 1,571.34-2,167.92-981.66

Finding the Fourth Proportional to 1,571.34, 2,167.92 and 981.66

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Solution

The fourth proportional to 1,571.34, 2,167.92 and 981.66 is: 1,354.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,571.34 : 2,167.92 = 981.66 : x
  2. Step 2: Convert to fraction form
    1,571.34/2,167.92 = 981.66/x
  3. Step 3: Cross multiply
    1,571.34x = 2,167.92 × 981.66
  4. Step 4: Simplify right side
    1,571.34x = 2,128,160.35
  5. Step 5: Solve for x
    x = 2,128,160.35/1,571.34
  6. Step 6: Final answer
    x = 1,354.36

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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.