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Finding the Fourth Proportional to 290,617.80, 435,840.30 and 113,022.60

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Solution

The fourth proportional to 290,617.80, 435,840.30 and 113,022.60 is: 169,500.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,617.80 : 435,840.30 = 113,022.60 : x
  2. Step 2: Convert to fraction form
    290,617.80/435,840.30 = 113,022.60/x
  3. Step 3: Cross multiply
    290,617.80x = 435,840.30 × 113,022.60
  4. Step 4: Simplify right side
    290,617.80x = 49,259,803,890.78
  5. Step 5: Solve for x
    x = 49,259,803,890.78/290,617.80
  6. Step 6: Final answer
    x = 169,500.30

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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.