Home / 428,463.43-642,697.43-128,941.96

Finding the Fourth Proportional to 428,463.43, 642,697.43 and 128,941.96

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Solution

The fourth proportional to 428,463.43, 642,697.43 and 128,941.96 is: 193,413.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,463.43 : 642,697.43 = 128,941.96 : x
  2. Step 2: Convert to fraction form
    428,463.43/642,697.43 = 128,941.96/x
  3. Step 3: Cross multiply
    428,463.43x = 642,697.43 × 128,941.96
  4. Step 4: Simplify right side
    428,463.43x = 82,870,666,311.16
  5. Step 5: Solve for x
    x = 82,870,666,311.16/428,463.43
  6. Step 6: Final answer
    x = 193,413.63

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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.