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Finding the Fourth Proportional to 339,894.55, 509,840.90 and 126,657.60

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Solution

The fourth proportional to 339,894.55, 509,840.90 and 126,657.60 is: 189,986.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,894.55 : 509,840.90 = 126,657.60 : x
  2. Step 2: Convert to fraction form
    339,894.55/509,840.90 = 126,657.60/x
  3. Step 3: Cross multiply
    339,894.55x = 509,840.90 × 126,657.60
  4. Step 4: Simplify right side
    339,894.55x = 64,575,224,775.84
  5. Step 5: Solve for x
    x = 64,575,224,775.84/339,894.55
  6. Step 6: Final answer
    x = 189,986.06

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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.