Home / 428,635.01-642,987.59-215,293.23

Finding the Fourth Proportional to 428,635.01, 642,987.59 and 215,293.23

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Solution

The fourth proportional to 428,635.01, 642,987.59 and 215,293.23 is: 322,957.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,635.01 : 642,987.59 = 215,293.23 : x
  2. Step 2: Convert to fraction form
    428,635.01/642,987.59 = 215,293.23/x
  3. Step 3: Cross multiply
    428,635.01x = 642,987.59 × 215,293.23
  4. Step 4: Simplify right side
    428,635.01x = 138,430,874,024.55
  5. Step 5: Solve for x
    x = 138,430,874,024.55/428,635.01
  6. Step 6: Final answer
    x = 322,957.46

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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.