Home / 728,145.68-1,091,512.80-278,520.32

Finding the Fourth Proportional to 728,145.68, 1,091,512.80 and 278,520.32

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Solution

The fourth proportional to 728,145.68, 1,091,512.80 and 278,520.32 is: 417,510.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    728,145.68 : 1,091,512.80 = 278,520.32 : x
  2. Step 2: Convert to fraction form
    728,145.68/1,091,512.80 = 278,520.32/x
  3. Step 3: Cross multiply
    728,145.68x = 1,091,512.80 × 278,520.32
  4. Step 4: Simplify right side
    728,145.68x = 304,008,494,340.10
  5. Step 5: Solve for x
    x = 304,008,494,340.10/728,145.68
  6. Step 6: Final answer
    x = 417,510.54

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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.