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Finding the Fourth Proportional to 620,549.30, 930,933.30 and 221,421.80

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Solution

The fourth proportional to 620,549.30, 930,933.30 and 221,421.80 is: 332,171.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,549.30 : 930,933.30 = 221,421.80 : x
  2. Step 2: Convert to fraction form
    620,549.30/930,933.30 = 221,421.80/x
  3. Step 3: Cross multiply
    620,549.30x = 930,933.30 × 221,421.80
  4. Step 4: Simplify right side
    620,549.30x = 206,128,926,965.94
  5. Step 5: Solve for x
    x = 206,128,926,965.94/620,549.30
  6. Step 6: Final answer
    x = 332,171.72

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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.