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Finding the Fourth Proportional to 290,308.20, 435,489.69 and 112,828.80

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Solution

The fourth proportional to 290,308.20, 435,489.69 and 112,828.80 is: 169,253.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,308.20 : 435,489.69 = 112,828.80 : x
  2. Step 2: Convert to fraction form
    290,308.20/435,489.69 = 112,828.80/x
  3. Step 3: Cross multiply
    290,308.20x = 435,489.69 × 112,828.80
  4. Step 4: Simplify right side
    290,308.20x = 49,135,779,135.07
  5. Step 5: Solve for x
    x = 49,135,779,135.07/290,308.20
  6. Step 6: Final answer
    x = 169,253.85

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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.