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Finding the Fourth Proportional to 491,390.22, 736,743.33 and 217,687.77

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Solution

The fourth proportional to 491,390.22, 736,743.33 and 217,687.77 is: 326,380.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    491,390.22 : 736,743.33 = 217,687.77 : x
  2. Step 2: Convert to fraction form
    491,390.22/736,743.33 = 217,687.77/x
  3. Step 3: Cross multiply
    491,390.22x = 736,743.33 × 217,687.77
  4. Step 4: Simplify right side
    491,390.22x = 160,380,012,570.07
  5. Step 5: Solve for x
    x = 160,380,012,570.07/491,390.22
  6. Step 6: Final answer
    x = 326,380.15

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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.