Home / 428,225.35-642,292.76-225,740.33

Finding the Fourth Proportional to 428,225.35, 642,292.76 and 225,740.33

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Solution

The fourth proportional to 428,225.35, 642,292.76 and 225,740.33 is: 338,586.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,225.35 : 642,292.76 = 225,740.33 : x
  2. Step 2: Convert to fraction form
    428,225.35/642,292.76 = 225,740.33/x
  3. Step 3: Cross multiply
    428,225.35x = 642,292.76 × 225,740.33
  4. Step 4: Simplify right side
    428,225.35x = 144,991,377,949.62
  5. Step 5: Solve for x
    x = 144,991,377,949.62/428,225.35
  6. Step 6: Final answer
    x = 338,586.63

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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.