Home / 1,539.78-2,125.38-1,520.34

Finding the Fourth Proportional to 1,539.78, 2,125.38 and 1,520.34

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Solution

The fourth proportional to 1,539.78, 2,125.38 and 1,520.34 is: 2,098.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,539.78 : 2,125.38 = 1,520.34 : x
  2. Step 2: Convert to fraction form
    1,539.78/2,125.38 = 1,520.34/x
  3. Step 3: Cross multiply
    1,539.78x = 2,125.38 × 1,520.34
  4. Step 4: Simplify right side
    1,539.78x = 3,231,300.23
  5. Step 5: Solve for x
    x = 3,231,300.23/1,539.78
  6. Step 6: Final answer
    x = 2,098.55

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1.5x scale

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.