Home / 1,340.55-2,009.58-519.36

Finding the Fourth Proportional to 1,340.55, 2,009.58 and 519.36

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Solution

The fourth proportional to 1,340.55, 2,009.58 and 519.36 is: 778.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,340.55 : 2,009.58 = 519.36 : x
  2. Step 2: Convert to fraction form
    1,340.55/2,009.58 = 519.36/x
  3. Step 3: Cross multiply
    1,340.55x = 2,009.58 × 519.36
  4. Step 4: Simplify right side
    1,340.55x = 1,043,695.47
  5. Step 5: Solve for x
    x = 1,043,695.47/1,340.55
  6. Step 6: Final answer
    x = 778.56

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.