Home / 857,930.13-1,286,904.31-258,896.55

Finding the Fourth Proportional to 857,930.13, 1,286,904.31 and 258,896.55

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Solution

The fourth proportional to 857,930.13, 1,286,904.31 and 258,896.55 is: 388,347.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    857,930.13 : 1,286,904.31 = 258,896.55 : x
  2. Step 2: Convert to fraction form
    857,930.13/1,286,904.31 = 258,896.55/x
  3. Step 3: Cross multiply
    857,930.13x = 1,286,904.31 × 258,896.55
  4. Step 4: Simplify right side
    857,930.13x = 333,175,090,217.78
  5. Step 5: Solve for x
    x = 333,175,090,217.78/857,930.13
  6. Step 6: Final answer
    x = 388,347.58

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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.