Home / 428,261.03-641,690.72-259,269.16

Finding the Fourth Proportional to 428,261.03, 641,690.72 and 259,269.16

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Solution

The fourth proportional to 428,261.03, 641,690.72 and 259,269.16 is: 388,479.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,261.03 : 641,690.72 = 259,269.16 : x
  2. Step 2: Convert to fraction form
    428,261.03/641,690.72 = 259,269.16/x
  3. Step 3: Cross multiply
    428,261.03x = 641,690.72 × 259,269.16
  4. Step 4: Simplify right side
    428,261.03x = 166,370,609,449.40
  5. Step 5: Solve for x
    x = 166,370,609,449.40/428,261.03
  6. Step 6: Final answer
    x = 388,479.45

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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.