Home / 687,426.92-1,029,920.34-287,186.84

Finding the Fourth Proportional to 687,426.92, 1,029,920.34 and 287,186.84

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Solution

The fourth proportional to 687,426.92, 1,029,920.34 and 287,186.84 is: 430,270.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,426.92 : 1,029,920.34 = 287,186.84 : x
  2. Step 2: Convert to fraction form
    687,426.92/1,029,920.34 = 287,186.84/x
  3. Step 3: Cross multiply
    687,426.92x = 1,029,920.34 × 287,186.84
  4. Step 4: Simplify right side
    687,426.92x = 295,779,567,896.33
  5. Step 5: Solve for x
    x = 295,779,567,896.33/687,426.92
  6. Step 6: Final answer
    x = 430,270.56

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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.