Home / 428,851.20-642,822.72-144,270.88

Finding the Fourth Proportional to 428,851.20, 642,822.72 and 144,270.88

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Solution

The fourth proportional to 428,851.20, 642,822.72 and 144,270.88 is: 216,253.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,851.20 : 642,822.72 = 144,270.88 : x
  2. Step 2: Convert to fraction form
    428,851.20/642,822.72 = 144,270.88/x
  3. Step 3: Cross multiply
    428,851.20x = 642,822.72 × 144,270.88
  4. Step 4: Simplify right side
    428,851.20x = 92,740,599,498.39
  5. Step 5: Solve for x
    x = 92,740,599,498.39/428,851.20
  6. Step 6: Final answer
    x = 216,253.56

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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.