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Finding the Fourth Proportional to 425,323.09, 637,984.64 and 125,780.34

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Solution

The fourth proportional to 425,323.09, 637,984.64 and 125,780.34 is: 188,670.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,323.09 : 637,984.64 = 125,780.34 : x
  2. Step 2: Convert to fraction form
    425,323.09/637,984.64 = 125,780.34/x
  3. Step 3: Cross multiply
    425,323.09x = 637,984.64 × 125,780.34
  4. Step 4: Simplify right side
    425,323.09x = 80,245,927,640.87
  5. Step 5: Solve for x
    x = 80,245,927,640.87/425,323.09
  6. Step 6: Final answer
    x = 188,670.52

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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.