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Finding the Fourth Proportional to 353,858.91, 530,315.46 and 129,008.13

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Solution

The fourth proportional to 353,858.91, 530,315.46 and 129,008.13 is: 193,339.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    353,858.91 : 530,315.46 = 129,008.13 : x
  2. Step 2: Convert to fraction form
    353,858.91/530,315.46 = 129,008.13/x
  3. Step 3: Cross multiply
    353,858.91x = 530,315.46 × 129,008.13
  4. Step 4: Simplify right side
    353,858.91x = 68,415,005,804.69
  5. Step 5: Solve for x
    x = 68,415,005,804.69/353,858.91
  6. Step 6: Final answer
    x = 193,339.79

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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.