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Finding the Fourth Proportional to 428,274.51, 642,362.09 and 112,756.02

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Solution

The fourth proportional to 428,274.51, 642,362.09 and 112,756.02 is: 169,120.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,274.51 : 642,362.09 = 112,756.02 : x
  2. Step 2: Convert to fraction form
    428,274.51/642,362.09 = 112,756.02/x
  3. Step 3: Cross multiply
    428,274.51x = 642,362.09 × 112,756.02
  4. Step 4: Simplify right side
    428,274.51x = 72,430,192,103.50
  5. Step 5: Solve for x
    x = 72,430,192,103.50/428,274.51
  6. Step 6: Final answer
    x = 169,120.95

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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.