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Finding the Fourth Proportional to 428,600.84, 642,838.07 and 113,079.92

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Solution

The fourth proportional to 428,600.84, 642,838.07 and 113,079.92 is: 169,603.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,600.84 : 642,838.07 = 113,079.92 : x
  2. Step 2: Convert to fraction form
    428,600.84/642,838.07 = 113,079.92/x
  3. Step 3: Cross multiply
    428,600.84x = 642,838.07 × 113,079.92
  4. Step 4: Simplify right side
    428,600.84x = 72,692,074,597.06
  5. Step 5: Solve for x
    x = 72,692,074,597.06/428,600.84
  6. Step 6: Final answer
    x = 169,603.20

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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.