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Finding the Fourth Proportional to 291,280.80, 436,921.20 and 104,224.80

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Solution

The fourth proportional to 291,280.80, 436,921.20 and 104,224.80 is: 156,337.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,280.80 : 436,921.20 = 104,224.80 : x
  2. Step 2: Convert to fraction form
    291,280.80/436,921.20 = 104,224.80/x
  3. Step 3: Cross multiply
    291,280.80x = 436,921.20 × 104,224.80
  4. Step 4: Simplify right side
    291,280.80x = 45,538,024,685.76
  5. Step 5: Solve for x
    x = 45,538,024,685.76/291,280.80
  6. Step 6: Final answer
    x = 156,337.20

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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.