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Finding the Fourth Proportional to 290,121.60, 435,673.14 and 189,091.26

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Solution

The fourth proportional to 290,121.60, 435,673.14 and 189,091.26 is: 283,956.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,121.60 : 435,673.14 = 189,091.26 : x
  2. Step 2: Convert to fraction form
    290,121.60/435,673.14 = 189,091.26/x
  3. Step 3: Cross multiply
    290,121.60x = 435,673.14 × 189,091.26
  4. Step 4: Simplify right side
    290,121.60x = 82,381,982,990.76
  5. Step 5: Solve for x
    x = 82,381,982,990.76/290,121.60
  6. Step 6: Final answer
    x = 283,956.74

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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.