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Finding the Fourth Proportional to 290,485.17, 435,727.42 and 100,945.55

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Solution

The fourth proportional to 290,485.17, 435,727.42 and 100,945.55 is: 151,418.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,485.17 : 435,727.42 = 100,945.55 : x
  2. Step 2: Convert to fraction form
    290,485.17/435,727.42 = 100,945.55/x
  3. Step 3: Cross multiply
    290,485.17x = 435,727.42 × 100,945.55
  4. Step 4: Simplify right side
    290,485.17x = 43,984,745,937.54
  5. Step 5: Solve for x
    x = 43,984,745,937.54/290,485.17
  6. Step 6: Final answer
    x = 151,418.21

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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.