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Finding the Fourth Proportional to 663,804,164.40, 996,462,073.80 and 391,328,458.80

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Solution

The fourth proportional to 663,804,164.40, 996,462,073.80 and 391,328,458.80 is: 587,438,266.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,804,164.40 : 996,462,073.80 = 391,328,458.80 : x
  2. Step 2: Convert to fraction form
    663,804,164.40/996,462,073.80 = 391,328,458.80/x
  3. Step 3: Cross multiply
    663,804,164.40x = 996,462,073.80 × 391,328,458.80
  4. Step 4: Simplify right side
    663,804,164.40x = 389,943,967,592,805,824
  5. Step 5: Solve for x
    x = 389,943,967,592,805,824/663,804,164.40
  6. Step 6: Final answer
    x = 587,438,266.44

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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.