Home / 1,539.16-2,124.28-979.87

Finding the Fourth Proportional to 1,539.16, 2,124.28 and 979.87

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Solution

The fourth proportional to 1,539.16, 2,124.28 and 979.87 is: 1,352.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,539.16 : 2,124.28 = 979.87 : x
  2. Step 2: Convert to fraction form
    1,539.16/2,124.28 = 979.87/x
  3. Step 3: Cross multiply
    1,539.16x = 2,124.28 × 979.87
  4. Step 4: Simplify right side
    1,539.16x = 2,081,512.63
  5. Step 5: Solve for x
    x = 2,081,512.63/1,539.16
  6. Step 6: Final answer
    x = 1,352.37

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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.