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Finding the Fourth Proportional to 291,676.20, 437,687.10 and 212,591.40

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Solution

The fourth proportional to 291,676.20, 437,687.10 and 212,591.40 is: 319,013.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,676.20 : 437,687.10 = 212,591.40 : x
  2. Step 2: Convert to fraction form
    291,676.20/437,687.10 = 212,591.40/x
  3. Step 3: Cross multiply
    291,676.20x = 437,687.10 × 212,591.40
  4. Step 4: Simplify right side
    291,676.20x = 93,048,513,350.94
  5. Step 5: Solve for x
    x = 93,048,513,350.94/291,676.20
  6. Step 6: Final answer
    x = 319,013.05

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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.