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Finding the Fourth Proportional to 392,909.10, 589,347.22 and 112,426.35

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Solution

The fourth proportional to 392,909.10, 589,347.22 and 112,426.35 is: 168,634.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,909.10 : 589,347.22 = 112,426.35 : x
  2. Step 2: Convert to fraction form
    392,909.10/589,347.22 = 112,426.35/x
  3. Step 3: Cross multiply
    392,909.10x = 589,347.22 × 112,426.35
  4. Step 4: Simplify right side
    392,909.10x = 66,258,156,827.25
  5. Step 5: Solve for x
    x = 66,258,156,827.25/392,909.10
  6. Step 6: Final answer
    x = 168,634.82

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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.