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Finding the Fourth Proportional to 1,215,000.10, 1,822,500.15 and 1,126,426.60

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Solution

The fourth proportional to 1,215,000.10, 1,822,500.15 and 1,126,426.60 is: 1,689,639.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,215,000.10 : 1,822,500.15 = 1,126,426.60 : x
  2. Step 2: Convert to fraction form
    1,215,000.10/1,822,500.15 = 1,126,426.60/x
  3. Step 3: Cross multiply
    1,215,000.10x = 1,822,500.15 × 1,126,426.60
  4. Step 4: Simplify right side
    1,215,000.10x = 2,052,912,647,463.99
  5. Step 5: Solve for x
    x = 2,052,912,647,463.99/1,215,000.10
  6. Step 6: Final answer
    x = 1,689,639.90

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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.