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Finding the Fourth Proportional to 291,188.47, 436,785.15 and 80,842.81

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Solution

The fourth proportional to 291,188.47, 436,785.15 and 80,842.81 is: 121,264.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,188.47 : 436,785.15 = 80,842.81 : x
  2. Step 2: Convert to fraction form
    291,188.47/436,785.15 = 80,842.81/x
  3. Step 3: Cross multiply
    291,188.47x = 436,785.15 × 80,842.81
  4. Step 4: Simplify right side
    291,188.47x = 35,310,938,892.27
  5. Step 5: Solve for x
    x = 35,310,938,892.27/291,188.47
  6. Step 6: Final answer
    x = 121,264.89

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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.