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Finding the Fourth Proportional to 290,310.72, 435,423.83 and 90,584.64

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Solution

The fourth proportional to 290,310.72, 435,423.83 and 90,584.64 is: 135,863.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,310.72 : 435,423.83 = 90,584.64 : x
  2. Step 2: Convert to fraction form
    290,310.72/435,423.83 = 90,584.64/x
  3. Step 3: Cross multiply
    290,310.72x = 435,423.83 × 90,584.64
  4. Step 4: Simplify right side
    290,310.72x = 39,442,710,887.97
  5. Step 5: Solve for x
    x = 39,442,710,887.97/290,310.72
  6. Step 6: Final answer
    x = 135,863.78

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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.