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Finding the Fourth Proportional to 386,145.90, 579,218.85 and 228,552.30

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Solution

The fourth proportional to 386,145.90, 579,218.85 and 228,552.30 is: 342,828.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,145.90 : 579,218.85 = 228,552.30 : x
  2. Step 2: Convert to fraction form
    386,145.90/579,218.85 = 228,552.30/x
  3. Step 3: Cross multiply
    386,145.90x = 579,218.85 × 228,552.30
  4. Step 4: Simplify right side
    386,145.90x = 132,381,800,370.86
  5. Step 5: Solve for x
    x = 132,381,800,370.86/386,145.90
  6. Step 6: Final answer
    x = 342,828.45

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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.