Home / 428,514.76-642,679.74-270,532.36

Finding the Fourth Proportional to 428,514.76, 642,679.74 and 270,532.36

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Solution

The fourth proportional to 428,514.76, 642,679.74 and 270,532.36 is: 405,740.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,514.76 : 642,679.74 = 270,532.36 : x
  2. Step 2: Convert to fraction form
    428,514.76/642,679.74 = 270,532.36/x
  3. Step 3: Cross multiply
    428,514.76x = 642,679.74 × 270,532.36
  4. Step 4: Simplify right side
    428,514.76x = 173,865,666,786.39
  5. Step 5: Solve for x
    x = 173,865,666,786.39/428,514.76
  6. Step 6: Final answer
    x = 405,740.21

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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.