Home / 428,629.06-642,943.59-144,295.82

Finding the Fourth Proportional to 428,629.06, 642,943.59 and 144,295.82

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Solution

The fourth proportional to 428,629.06, 642,943.59 and 144,295.82 is: 216,443.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,629.06 : 642,943.59 = 144,295.82 : x
  2. Step 2: Convert to fraction form
    428,629.06/642,943.59 = 144,295.82/x
  3. Step 3: Cross multiply
    428,629.06x = 642,943.59 × 144,295.82
  4. Step 4: Simplify right side
    428,629.06x = 92,774,074,140.15
  5. Step 5: Solve for x
    x = 92,774,074,140.15/428,629.06
  6. Step 6: Final answer
    x = 216,443.74

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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.