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Finding the Fourth Proportional to 989,713,972.80, 1,484,193,045.60 and 299,391,796.80

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Solution

The fourth proportional to 989,713,972.80, 1,484,193,045.60 and 299,391,796.80 is: 448,973,375.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    989,713,972.80 : 1,484,193,045.60 = 299,391,796.80 : x
  2. Step 2: Convert to fraction form
    989,713,972.80/1,484,193,045.60 = 299,391,796.80/x
  3. Step 3: Cross multiply
    989,713,972.80x = 1,484,193,045.60 × 299,391,796.80
  4. Step 4: Simplify right side
    989,713,972.80x = 444,355,222,720,248,320
  5. Step 5: Solve for x
    x = 444,355,222,720,248,320/989,713,972.80
  6. Step 6: Final answer
    x = 448,973,375.07

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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.