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Finding the Fourth Proportional to 386,472.61, 579,117.71 and 206,583.62

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Solution

The fourth proportional to 386,472.61, 579,117.71 and 206,583.62 is: 309,559.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,472.61 : 579,117.71 = 206,583.62 : x
  2. Step 2: Convert to fraction form
    386,472.61/579,117.71 = 206,583.62/x
  3. Step 3: Cross multiply
    386,472.61x = 579,117.71 × 206,583.62
  4. Step 4: Simplify right side
    386,472.61x = 119,636,234,902.16
  5. Step 5: Solve for x
    x = 119,636,234,902.16/386,472.61
  6. Step 6: Final answer
    x = 309,559.42

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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.