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Finding the Fourth Proportional to 290,310.47, 435,423.46 and 90,584.39

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Solution

The fourth proportional to 290,310.47, 435,423.46 and 90,584.39 is: 135,863.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,310.47 : 435,423.46 = 90,584.39 : x
  2. Step 2: Convert to fraction form
    290,310.47/435,423.46 = 90,584.39/x
  3. Step 3: Cross multiply
    290,310.47x = 435,423.46 × 90,584.39
  4. Step 4: Simplify right side
    290,310.47x = 39,442,566,112.21
  5. Step 5: Solve for x
    x = 39,442,566,112.21/290,310.47
  6. Step 6: Final answer
    x = 135,863.40

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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.