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Finding the Fourth Proportional to 449,118.80, 619,701.02 and 255,515.21

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Solution

The fourth proportional to 449,118.80, 619,701.02 and 255,515.21 is: 352,563.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    449,118.80 : 619,701.02 = 255,515.21 : x
  2. Step 2: Convert to fraction form
    449,118.80/619,701.02 = 255,515.21/x
  3. Step 3: Cross multiply
    449,118.80x = 619,701.02 × 255,515.21
  4. Step 4: Simplify right side
    449,118.80x = 158,343,031,886.43
  5. Step 5: Solve for x
    x = 158,343,031,886.43/449,118.80
  6. Step 6: Final answer
    x = 352,563.81

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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.