Home / 677,721.40-1,015,415.70-440,942.20

Finding the Fourth Proportional to 677,721.40, 1,015,415.70 and 440,942.20

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Solution

The fourth proportional to 677,721.40, 1,015,415.70 and 440,942.20 is: 660,654.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    677,721.40 : 1,015,415.70 = 440,942.20 : x
  2. Step 2: Convert to fraction form
    677,721.40/1,015,415.70 = 440,942.20/x
  3. Step 3: Cross multiply
    677,721.40x = 1,015,415.70 × 440,942.20
  4. Step 4: Simplify right side
    677,721.40x = 447,739,632,672.54
  5. Step 5: Solve for x
    x = 447,739,632,672.54/677,721.40
  6. Step 6: Final answer
    x = 660,654.41

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1.5x scale

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.