Home / 1,539.12-2,123.87-875.97

Finding the Fourth Proportional to 1,539.12, 2,123.87 and 875.97

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Solution

The fourth proportional to 1,539.12, 2,123.87 and 875.97 is: 1,208.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,539.12 : 2,123.87 = 875.97 : x
  2. Step 2: Convert to fraction form
    1,539.12/2,123.87 = 875.97/x
  3. Step 3: Cross multiply
    1,539.12x = 2,123.87 × 875.97
  4. Step 4: Simplify right side
    1,539.12x = 1,860,446.40
  5. Step 5: Solve for x
    x = 1,860,446.40/1,539.12
  6. Step 6: Final answer
    x = 1,208.77

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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.