Home / 857,921.28-1,286,849.57-258,866.46

Finding the Fourth Proportional to 857,921.28, 1,286,849.57 and 258,866.46

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Solution

The fourth proportional to 857,921.28, 1,286,849.57 and 258,866.46 is: 388,289.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    857,921.28 : 1,286,849.57 = 258,866.46 : x
  2. Step 2: Convert to fraction form
    857,921.28/1,286,849.57 = 258,866.46/x
  3. Step 3: Cross multiply
    857,921.28x = 1,286,849.57 × 258,866.46
  4. Step 4: Simplify right side
    857,921.28x = 333,122,191,444.09
  5. Step 5: Solve for x
    x = 333,122,191,444.09/857,921.28
  6. Step 6: Final answer
    x = 388,289.93

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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.