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Finding the Fourth Proportional to 426,896.26, 640,703.62 and 213,600.18

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Solution

The fourth proportional to 426,896.26, 640,703.62 and 213,600.18 is: 320,580.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,896.26 : 640,703.62 = 213,600.18 : x
  2. Step 2: Convert to fraction form
    426,896.26/640,703.62 = 213,600.18/x
  3. Step 3: Cross multiply
    426,896.26x = 640,703.62 × 213,600.18
  4. Step 4: Simplify right side
    426,896.26x = 136,854,408,558.65
  5. Step 5: Solve for x
    x = 136,854,408,558.65/426,896.26
  6. Step 6: Final answer
    x = 320,580.01

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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.