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Finding the Fourth Proportional to 290,842.13, 436,263.20 and 80,480.07

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Solution

The fourth proportional to 290,842.13, 436,263.20 and 80,480.07 is: 120,720.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,842.13 : 436,263.20 = 80,480.07 : x
  2. Step 2: Convert to fraction form
    290,842.13/436,263.20 = 80,480.07/x
  3. Step 3: Cross multiply
    290,842.13x = 436,263.20 × 80,480.07
  4. Step 4: Simplify right side
    290,842.13x = 35,110,492,472.02
  5. Step 5: Solve for x
    x = 35,110,492,472.02/290,842.13
  6. Step 6: Final answer
    x = 120,720.11

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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.