Home / 428,937.19-643,405.82-113,394.13

Finding the Fourth Proportional to 428,937.19, 643,405.82 and 113,394.13

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Solution

The fourth proportional to 428,937.19, 643,405.82 and 113,394.13 is: 170,091.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,937.19 : 643,405.82 = 113,394.13 : x
  2. Step 2: Convert to fraction form
    428,937.19/643,405.82 = 113,394.13/x
  3. Step 3: Cross multiply
    428,937.19x = 643,405.82 × 113,394.13
  4. Step 4: Simplify right side
    428,937.19x = 72,958,441,020.35
  5. Step 5: Solve for x
    x = 72,958,441,020.35/428,937.19
  6. Step 6: Final answer
    x = 170,091.20

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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.