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Finding the Fourth Proportional to 290,472.90, 435,709.68 and 90,794.34

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Solution

The fourth proportional to 290,472.90, 435,709.68 and 90,794.34 is: 136,191.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,472.90 : 435,709.68 = 90,794.34 : x
  2. Step 2: Convert to fraction form
    290,472.90/435,709.68 = 90,794.34/x
  3. Step 3: Cross multiply
    290,472.90x = 435,709.68 × 90,794.34
  4. Step 4: Simplify right side
    290,472.90x = 39,559,972,827.21
  5. Step 5: Solve for x
    x = 39,559,972,827.21/290,472.90
  6. Step 6: Final answer
    x = 136,191.61

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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.