Home / 857,812.37-1,286,727.80-258,778.72

Finding the Fourth Proportional to 857,812.37, 1,286,727.80 and 258,778.72

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Solution

The fourth proportional to 857,812.37, 1,286,727.80 and 258,778.72 is: 388,170.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    857,812.37 : 1,286,727.80 = 258,778.72 : x
  2. Step 2: Convert to fraction form
    857,812.37/1,286,727.80 = 258,778.72/x
  3. Step 3: Cross multiply
    857,812.37x = 1,286,727.80 × 258,778.72
  4. Step 4: Simplify right side
    857,812.37x = 332,977,773,072.42
  5. Step 5: Solve for x
    x = 332,977,773,072.42/857,812.37
  6. Step 6: Final answer
    x = 388,170.87

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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.