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Finding the Fourth Proportional to 493,871.11, 740,806.47 and 138,885.11

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Solution

The fourth proportional to 493,871.11, 740,806.47 and 138,885.11 is: 208,327.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    493,871.11 : 740,806.47 = 138,885.11 : x
  2. Step 2: Convert to fraction form
    493,871.11/740,806.47 = 138,885.11/x
  3. Step 3: Cross multiply
    493,871.11x = 740,806.47 × 138,885.11
  4. Step 4: Simplify right side
    493,871.11x = 102,886,987,148.65
  5. Step 5: Solve for x
    x = 102,886,987,148.65/493,871.11
  6. Step 6: Final answer
    x = 208,327.61

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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.