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Finding the Fourth Proportional to 290,245.29, 435,352.56 and 90,542.79

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Solution

The fourth proportional to 290,245.29, 435,352.56 and 90,542.79 is: 135,809.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,245.29 : 435,352.56 = 90,542.79 : x
  2. Step 2: Convert to fraction form
    290,245.29/435,352.56 = 90,542.79/x
  3. Step 3: Cross multiply
    290,245.29x = 435,352.56 × 90,542.79
  4. Step 4: Simplify right side
    290,245.29x = 39,418,035,416.04
  5. Step 5: Solve for x
    x = 39,418,035,416.04/290,245.29
  6. Step 6: Final answer
    x = 135,809.39

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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.