Home / 428,268.87-642,154.30-162,049.95

Finding the Fourth Proportional to 428,268.87, 642,154.30 and 162,049.95

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Solution

The fourth proportional to 428,268.87, 642,154.30 and 162,049.95 is: 242,980.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,268.87 : 642,154.30 = 162,049.95 : x
  2. Step 2: Convert to fraction form
    428,268.87/642,154.30 = 162,049.95/x
  3. Step 3: Cross multiply
    428,268.87x = 642,154.30 × 162,049.95
  4. Step 4: Simplify right side
    428,268.87x = 104,061,071,802.16
  5. Step 5: Solve for x
    x = 104,061,071,802.16/428,268.87
  6. Step 6: Final answer
    x = 242,980.70

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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.