Home / 428,863,920.87-643,567,969.62-183,222,406.38

Finding the Fourth Proportional to 428,863,920.87, 643,567,969.62 and 183,222,406.38

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Solution

The fourth proportional to 428,863,920.87, 643,567,969.62 and 183,222,406.38 is: 274,949,853.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,863,920.87 : 643,567,969.62 = 183,222,406.38 : x
  2. Step 2: Convert to fraction form
    428,863,920.87/643,567,969.62 = 183,222,406.38/x
  3. Step 3: Cross multiply
    428,863,920.87x = 643,567,969.62 × 183,222,406.38
  4. Step 4: Simplify right side
    428,863,920.87x = 117,916,072,062,867,136
  5. Step 5: Solve for x
    x = 117,916,072,062,867,136/428,863,920.87
  6. Step 6: Final answer
    x = 274,949,853.15

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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.