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Finding the Fourth Proportional to 386,358.12, 579,534.12 and 120,118.14

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Solution

The fourth proportional to 386,358.12, 579,534.12 and 120,118.14 is: 180,176.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,358.12 : 579,534.12 = 120,118.14 : x
  2. Step 2: Convert to fraction form
    386,358.12/579,534.12 = 120,118.14/x
  3. Step 3: Cross multiply
    386,358.12x = 579,534.12 × 120,118.14
  4. Step 4: Simplify right side
    386,358.12x = 69,612,560,560.94
  5. Step 5: Solve for x
    x = 69,612,560,560.94/386,358.12
  6. Step 6: Final answer
    x = 180,176.26

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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.