Home / 428,215.80-642,287.25-175,424.12

Finding the Fourth Proportional to 428,215.80, 642,287.25 and 175,424.12

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Solution

The fourth proportional to 428,215.80, 642,287.25 and 175,424.12 is: 263,121.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,215.80 : 642,287.25 = 175,424.12 : x
  2. Step 2: Convert to fraction form
    428,215.80/642,287.25 = 175,424.12/x
  3. Step 3: Cross multiply
    428,215.80x = 642,287.25 × 175,424.12
  4. Step 4: Simplify right side
    428,215.80x = 112,672,675,618.47
  5. Step 5: Solve for x
    x = 112,672,675,618.47/428,215.80
  6. Step 6: Final answer
    x = 263,121.25

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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.