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Finding the Fourth Proportional to 891,064.70, 1,333,644.60 and 820,205.90

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Solution

The fourth proportional to 891,064.70, 1,333,644.60 and 820,205.90 is: 1,227,591.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    891,064.70 : 1,333,644.60 = 820,205.90 : x
  2. Step 2: Convert to fraction form
    891,064.70/1,333,644.60 = 820,205.90/x
  3. Step 3: Cross multiply
    891,064.70x = 1,333,644.60 × 820,205.90
  4. Step 4: Simplify right side
    891,064.70x = 1,093,863,169,423.14
  5. Step 5: Solve for x
    x = 1,093,863,169,423.14/891,064.70
  6. Step 6: Final answer
    x = 1,227,591.18

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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.