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Finding the Fourth Proportional to 392,779.56, 589,203.51 and 108,470.49

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Solution

The fourth proportional to 392,779.56, 589,203.51 and 108,470.49 is: 162,715.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,779.56 : 589,203.51 = 108,470.49 : x
  2. Step 2: Convert to fraction form
    392,779.56/589,203.51 = 108,470.49/x
  3. Step 3: Cross multiply
    392,779.56x = 589,203.51 × 108,470.49
  4. Step 4: Simplify right side
    392,779.56x = 63,911,193,439.42
  5. Step 5: Solve for x
    x = 63,911,193,439.42/392,779.56
  6. Step 6: Final answer
    x = 162,715.17

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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.