Home / 428,052,578.51-641,921,376.42-147,862,188.07

Finding the Fourth Proportional to 428,052,578.51, 641,921,376.42 and 147,862,188.07

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Solution

The fourth proportional to 428,052,578.51, 641,921,376.42 and 147,862,188.07 is: 221,738,879.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,052,578.51 : 641,921,376.42 = 147,862,188.07 : x
  2. Step 2: Convert to fraction form
    428,052,578.51/641,921,376.42 = 147,862,188.07/x
  3. Step 3: Cross multiply
    428,052,578.51x = 641,921,376.42 × 147,862,188.07
  4. Step 4: Simplify right side
    428,052,578.51x = 94,915,899,284,762,496
  5. Step 5: Solve for x
    x = 94,915,899,284,762,496/428,052,578.51
  6. Step 6: Final answer
    x = 221,738,879.87

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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.