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Finding the Fourth Proportional to 291,730.40, 436,720.80 and 274,428.80

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Solution

The fourth proportional to 291,730.40, 436,720.80 and 274,428.80 is: 410,820.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,730.40 : 436,720.80 = 274,428.80 : x
  2. Step 2: Convert to fraction form
    291,730.40/436,720.80 = 274,428.80/x
  3. Step 3: Cross multiply
    291,730.40x = 436,720.80 × 274,428.80
  4. Step 4: Simplify right side
    291,730.40x = 119,848,765,079.04
  5. Step 5: Solve for x
    x = 119,848,765,079.04/291,730.40
  6. Step 6: Final answer
    x = 410,820.28

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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.