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Finding the Fourth Proportional to 290,073.85, 435,110.90 and 90,410.33

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Solution

The fourth proportional to 290,073.85, 435,110.90 and 90,410.33 is: 135,615.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,073.85 : 435,110.90 = 90,410.33 : x
  2. Step 2: Convert to fraction form
    290,073.85/435,110.90 = 90,410.33/x
  3. Step 3: Cross multiply
    290,073.85x = 435,110.90 × 90,410.33
  4. Step 4: Simplify right side
    290,073.85x = 39,338,520,691.32
  5. Step 5: Solve for x
    x = 39,338,520,691.32/290,073.85
  6. Step 6: Final answer
    x = 135,615.54

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1.5x scale

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.