Home / 428,864.80-643,297.20-179,725.60

Finding the Fourth Proportional to 428,864.80, 643,297.20 and 179,725.60

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Solution

The fourth proportional to 428,864.80, 643,297.20 and 179,725.60 is: 269,588.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,864.80 : 643,297.20 = 179,725.60 : x
  2. Step 2: Convert to fraction form
    428,864.80/643,297.20 = 179,725.60/x
  3. Step 3: Cross multiply
    428,864.80x = 643,297.20 × 179,725.60
  4. Step 4: Simplify right side
    428,864.80x = 115,616,975,248.32
  5. Step 5: Solve for x
    x = 115,616,975,248.32/428,864.80
  6. Step 6: Final answer
    x = 269,588.40

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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.