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Finding the Fourth Proportional to 586,885.73, 809,890.12 and 318,613.73

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Solution

The fourth proportional to 586,885.73, 809,890.12 and 318,613.73 is: 439,680.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    586,885.73 : 809,890.12 = 318,613.73 : x
  2. Step 2: Convert to fraction form
    586,885.73/809,890.12 = 318,613.73/x
  3. Step 3: Cross multiply
    586,885.73x = 809,890.12 × 318,613.73
  4. Step 4: Simplify right side
    586,885.73x = 258,042,112,023.35
  5. Step 5: Solve for x
    x = 258,042,112,023.35/586,885.73
  6. Step 6: Final answer
    x = 439,680.33

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.