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Finding the Fourth Proportional to 811,490.80, 1,214,471.40 and 811,490.80

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Solution

The fourth proportional to 811,490.80, 1,214,471.40 and 811,490.80 is: 1,214,471.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    811,490.80 : 1,214,471.40 = 811,490.80 : x
  2. Step 2: Convert to fraction form
    811,490.80/1,214,471.40 = 811,490.80/x
  3. Step 3: Cross multiply
    811,490.80x = 1,214,471.40 × 811,490.80
  4. Step 4: Simplify right side
    811,490.80x = 985,532,367,963.12
  5. Step 5: Solve for x
    x = 985,532,367,963.12/811,490.80
  6. Step 6: Final answer
    x = 1,214,471.40

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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.