Home / 428,801.31-643,261.36-144,573.22

Finding the Fourth Proportional to 428,801.31, 643,261.36 and 144,573.22

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Solution

The fourth proportional to 428,801.31, 643,261.36 and 144,573.22 is: 216,879.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,801.31 : 643,261.36 = 144,573.22 : x
  2. Step 2: Convert to fraction form
    428,801.31/643,261.36 = 144,573.22/x
  3. Step 3: Cross multiply
    428,801.31x = 643,261.36 × 144,573.22
  4. Step 4: Simplify right side
    428,801.31x = 92,998,364,147.19
  5. Step 5: Solve for x
    x = 92,998,364,147.19/428,801.31
  6. Step 6: Final answer
    x = 216,879.85

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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.