Home / 857,921.13-1,286,890.81-258,887.56

Finding the Fourth Proportional to 857,921.13, 1,286,890.81 and 258,887.56

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Solution

The fourth proportional to 857,921.13, 1,286,890.81 and 258,887.56 is: 388,334.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    857,921.13 : 1,286,890.81 = 258,887.56 : x
  2. Step 2: Convert to fraction form
    857,921.13/1,286,890.81 = 258,887.56/x
  3. Step 3: Cross multiply
    857,921.13x = 1,286,890.81 × 258,887.56
  4. Step 4: Simplify right side
    857,921.13x = 333,160,017,922.88
  5. Step 5: Solve for x
    x = 333,160,017,922.88/857,921.13
  6. Step 6: Final answer
    x = 388,334.09

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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.