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Finding the Fourth Proportional to 290,074.85, 435,112.40 and 90,411.33

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Solution

The fourth proportional to 290,074.85, 435,112.40 and 90,411.33 is: 135,617.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,074.85 : 435,112.40 = 90,411.33 : x
  2. Step 2: Convert to fraction form
    290,074.85/435,112.40 = 90,411.33/x
  3. Step 3: Cross multiply
    290,074.85x = 435,112.40 × 90,411.33
  4. Step 4: Simplify right side
    290,074.85x = 39,339,090,783.49
  5. Step 5: Solve for x
    x = 39,339,090,783.49/290,074.85
  6. Step 6: Final answer
    x = 135,617.03

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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.