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Finding the Fourth Proportional to 620,778.52, 931,167.78 and 221,403.16

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Solution

The fourth proportional to 620,778.52, 931,167.78 and 221,403.16 is: 332,104.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,778.52 : 931,167.78 = 221,403.16 : x
  2. Step 2: Convert to fraction form
    620,778.52/931,167.78 = 221,403.16/x
  3. Step 3: Cross multiply
    620,778.52x = 931,167.78 × 221,403.16
  4. Step 4: Simplify right side
    620,778.52x = 206,163,488,982.19
  5. Step 5: Solve for x
    x = 206,163,488,982.19/620,778.52
  6. Step 6: Final answer
    x = 332,104.74

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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.