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Finding the Fourth Proportional to 449,806.42, 621,197.67 and 389,085.58

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Solution

The fourth proportional to 449,806.42, 621,197.67 and 389,085.58 is: 537,340.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    449,806.42 : 621,197.67 = 389,085.58 : x
  2. Step 2: Convert to fraction form
    449,806.42/621,197.67 = 389,085.58/x
  3. Step 3: Cross multiply
    449,806.42x = 621,197.67 × 389,085.58
  4. Step 4: Simplify right side
    449,806.42x = 241,699,055,726.60
  5. Step 5: Solve for x
    x = 241,699,055,726.60/449,806.42
  6. Step 6: Final answer
    x = 537,340.16

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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.