Home / 857,813.66-1,286,729.72-258,780.02

Finding the Fourth Proportional to 857,813.66, 1,286,729.72 and 258,780.02

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Solution

The fourth proportional to 857,813.66, 1,286,729.72 and 258,780.02 is: 388,172.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    857,813.66 : 1,286,729.72 = 258,780.02 : x
  2. Step 2: Convert to fraction form
    857,813.66/1,286,729.72 = 258,780.02/x
  3. Step 3: Cross multiply
    857,813.66x = 1,286,729.72 × 258,780.02
  4. Step 4: Simplify right side
    857,813.66x = 332,979,942,676.19
  5. Step 5: Solve for x
    x = 332,979,942,676.19/857,813.66
  6. Step 6: Final answer
    x = 388,172.81

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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.