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Finding the Fourth Proportional to 392,908.10, 589,345.73 and 112,425.35

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Solution

The fourth proportional to 392,908.10, 589,345.73 and 112,425.35 is: 168,633.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,908.10 : 589,345.73 = 112,425.35 : x
  2. Step 2: Convert to fraction form
    392,908.10/589,345.73 = 112,425.35/x
  3. Step 3: Cross multiply
    392,908.10x = 589,345.73 × 112,425.35
  4. Step 4: Simplify right side
    392,908.10x = 66,257,396,457.40
  5. Step 5: Solve for x
    x = 66,257,396,457.40/392,908.10
  6. Step 6: Final answer
    x = 168,633.32

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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.