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Finding the Fourth Proportional to 272,909.80, 409,364.70 and 253,226.80

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Solution

The fourth proportional to 272,909.80, 409,364.70 and 253,226.80 is: 379,840.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,909.80 : 409,364.70 = 253,226.80 : x
  2. Step 2: Convert to fraction form
    272,909.80/409,364.70 = 253,226.80/x
  3. Step 3: Cross multiply
    272,909.80x = 409,364.70 × 253,226.80
  4. Step 4: Simplify right side
    272,909.80x = 103,662,113,013.96
  5. Step 5: Solve for x
    x = 103,662,113,013.96/272,909.80
  6. Step 6: Final answer
    x = 379,840.20

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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.