Home / 428,796.51-642,337.23-257,923.83

Finding the Fourth Proportional to 428,796.51, 642,337.23 and 257,923.83

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Solution

The fourth proportional to 428,796.51, 642,337.23 and 257,923.83 is: 386,369.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,796.51 : 642,337.23 = 257,923.83 : x
  2. Step 2: Convert to fraction form
    428,796.51/642,337.23 = 257,923.83/x
  3. Step 3: Cross multiply
    428,796.51x = 642,337.23 × 257,923.83
  4. Step 4: Simplify right side
    428,796.51x = 165,674,078,513.19
  5. Step 5: Solve for x
    x = 165,674,078,513.19/428,796.51
  6. Step 6: Final answer
    x = 386,369.93

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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.