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Finding the Fourth Proportional to 388,830.78, 583,190.79 and 122,556.68

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Solution

The fourth proportional to 388,830.78, 583,190.79 and 122,556.68 is: 183,817.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,830.78 : 583,190.79 = 122,556.68 : x
  2. Step 2: Convert to fraction form
    388,830.78/583,190.79 = 122,556.68/x
  3. Step 3: Cross multiply
    388,830.78x = 583,190.79 × 122,556.68
  4. Step 4: Simplify right side
    388,830.78x = 71,473,925,840.40
  5. Step 5: Solve for x
    x = 71,473,925,840.40/388,830.78
  6. Step 6: Final answer
    x = 183,817.56

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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.