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Finding the Fourth Proportional to 989,764,807.20, 1,485,603,804.60 and 499,032,187.80

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Solution

The fourth proportional to 989,764,807.20, 1,485,603,804.60 and 499,032,187.80 is: 749,030,589.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    989,764,807.20 : 1,485,603,804.60 = 499,032,187.80 : x
  2. Step 2: Convert to fraction form
    989,764,807.20/1,485,603,804.60 = 499,032,187.80/x
  3. Step 3: Cross multiply
    989,764,807.20x = 1,485,603,804.60 × 499,032,187.80
  4. Step 4: Simplify right side
    989,764,807.20x = 741,364,116,813,541,632
  5. Step 5: Solve for x
    x = 741,364,116,813,541,632/989,764,807.20
  6. Step 6: Final answer
    x = 749,030,589.31

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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.