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Finding the Fourth Proportional to 290,308.21, 435,462.36 and 90,645.70

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Solution

The fourth proportional to 290,308.21, 435,462.36 and 90,645.70 is: 135,968.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,308.21 : 435,462.36 = 90,645.70 : x
  2. Step 2: Convert to fraction form
    290,308.21/435,462.36 = 90,645.70/x
  3. Step 3: Cross multiply
    290,308.21x = 435,462.36 × 90,645.70
  4. Step 4: Simplify right side
    290,308.21x = 39,472,790,445.85
  5. Step 5: Solve for x
    x = 39,472,790,445.85/290,308.21
  6. Step 6: Final answer
    x = 135,968.56

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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.