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Finding the Fourth Proportional to 811,491.30, 1,214,472.15 and 811,491.30

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Solution

The fourth proportional to 811,491.30, 1,214,472.15 and 811,491.30 is: 1,214,472.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    811,491.30 : 1,214,472.15 = 811,491.30 : x
  2. Step 2: Convert to fraction form
    811,491.30/1,214,472.15 = 811,491.30/x
  3. Step 3: Cross multiply
    811,491.30x = 1,214,472.15 × 811,491.30
  4. Step 4: Simplify right side
    811,491.30x = 985,533,583,817.30
  5. Step 5: Solve for x
    x = 985,533,583,817.30/811,491.30
  6. Step 6: Final answer
    x = 1,214,472.15

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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.