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Finding the Fourth Proportional to 290,021.58, 435,000.11 and 90,325.26

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Solution

The fourth proportional to 290,021.58, 435,000.11 and 90,325.26 is: 135,477.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,021.58 : 435,000.11 = 90,325.26 : x
  2. Step 2: Convert to fraction form
    290,021.58/435,000.11 = 90,325.26/x
  3. Step 3: Cross multiply
    290,021.58x = 435,000.11 × 90,325.26
  4. Step 4: Simplify right side
    290,021.58x = 39,291,497,584.15
  5. Step 5: Solve for x
    x = 39,291,497,584.15/290,021.58
  6. Step 6: Final answer
    x = 135,477.84

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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.