Home / 428,840.80-643,568.40-179,701.60

Finding the Fourth Proportional to 428,840.80, 643,568.40 and 179,701.60

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Solution

The fourth proportional to 428,840.80, 643,568.40 and 179,701.60 is: 269,681.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,840.80 : 643,568.40 = 179,701.60 : x
  2. Step 2: Convert to fraction form
    428,840.80/643,568.40 = 179,701.60/x
  3. Step 3: Cross multiply
    428,840.80x = 643,568.40 × 179,701.60
  4. Step 4: Simplify right side
    428,840.80x = 115,650,271,189.44
  5. Step 5: Solve for x
    x = 115,650,271,189.44/428,840.80
  6. Step 6: Final answer
    x = 269,681.13

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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.