Home / 428,626.04-642,856.82-215,336.84

Finding the Fourth Proportional to 428,626.04, 642,856.82 and 215,336.84

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Solution

The fourth proportional to 428,626.04, 642,856.82 and 215,336.84 is: 322,963.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,626.04 : 642,856.82 = 215,336.84 : x
  2. Step 2: Convert to fraction form
    428,626.04/642,856.82 = 215,336.84/x
  3. Step 3: Cross multiply
    428,626.04x = 642,856.82 × 215,336.84
  4. Step 4: Simplify right side
    428,626.04x = 138,430,756,191.25
  5. Step 5: Solve for x
    x = 138,430,756,191.25/428,626.04
  6. Step 6: Final answer
    x = 322,963.94

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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.