Home / 386,999.10-579,721.05-261,027.90

Finding the Fourth Proportional to 386,999.10, 579,721.05 and 261,027.90

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Solution

The fourth proportional to 386,999.10, 579,721.05 and 261,027.90 is: 391,017.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,999.10 : 579,721.05 = 261,027.90 : x
  2. Step 2: Convert to fraction form
    386,999.10/579,721.05 = 261,027.90/x
  3. Step 3: Cross multiply
    386,999.10x = 579,721.05 × 261,027.90
  4. Step 4: Simplify right side
    386,999.10x = 151,323,368,267.30
  5. Step 5: Solve for x
    x = 151,323,368,267.30/386,999.10
  6. Step 6: Final answer
    x = 391,017.36

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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.