Home / 857,920.78-1,286,848.81-258,865.96

Finding the Fourth Proportional to 857,920.78, 1,286,848.81 and 258,865.96

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Solution

The fourth proportional to 857,920.78, 1,286,848.81 and 258,865.96 is: 388,289.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    857,920.78 : 1,286,848.81 = 258,865.96 : x
  2. Step 2: Convert to fraction form
    857,920.78/1,286,848.81 = 258,865.96/x
  3. Step 3: Cross multiply
    857,920.78x = 1,286,848.81 × 258,865.96
  4. Step 4: Simplify right side
    857,920.78x = 333,121,352,575.51
  5. Step 5: Solve for x
    x = 333,121,352,575.51/857,920.78
  6. Step 6: Final answer
    x = 388,289.18

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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.