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Finding the Fourth Proportional to 820,265.60, 1,230,398.40 and 803,676.80

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Solution

The fourth proportional to 820,265.60, 1,230,398.40 and 803,676.80 is: 1,205,515.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    820,265.60 : 1,230,398.40 = 803,676.80 : x
  2. Step 2: Convert to fraction form
    820,265.60/1,230,398.40 = 803,676.80/x
  3. Step 3: Cross multiply
    820,265.60x = 1,230,398.40 × 803,676.80
  4. Step 4: Simplify right side
    820,265.60x = 988,842,648,837.12
  5. Step 5: Solve for x
    x = 988,842,648,837.12/820,265.60
  6. Step 6: Final answer
    x = 1,205,515.20

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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.