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Finding the Fourth Proportional to 392,855.20, 589,282.76 and 112,372.45

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Solution

The fourth proportional to 392,855.20, 589,282.76 and 112,372.45 is: 168,558.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,855.20 : 589,282.76 = 112,372.45 : x
  2. Step 2: Convert to fraction form
    392,855.20/589,282.76 = 112,372.45/x
  3. Step 3: Cross multiply
    392,855.20x = 589,282.76 × 112,372.45
  4. Step 4: Simplify right side
    392,855.20x = 66,219,146,291.69
  5. Step 5: Solve for x
    x = 66,219,146,291.69/392,855.20
  6. Step 6: Final answer
    x = 168,558.66

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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.