Home / 1,539.37-2,123.64-1,008.82

Finding the Fourth Proportional to 1,539.37, 2,123.64 and 1,008.82

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Solution

The fourth proportional to 1,539.37, 2,123.64 and 1,008.82 is: 1,391.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,539.37 : 2,123.64 = 1,008.82 : x
  2. Step 2: Convert to fraction form
    1,539.37/2,123.64 = 1,008.82/x
  3. Step 3: Cross multiply
    1,539.37x = 2,123.64 × 1,008.82
  4. Step 4: Simplify right side
    1,539.37x = 2,142,365.20
  5. Step 5: Solve for x
    x = 2,142,365.20/1,539.37
  6. Step 6: Final answer
    x = 1,391.72

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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.