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Finding the Fourth Proportional to 279,158.80, 418,738.20 and 266,328.40

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Solution

The fourth proportional to 279,158.80, 418,738.20 and 266,328.40 is: 399,492.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,158.80 : 418,738.20 = 266,328.40 : x
  2. Step 2: Convert to fraction form
    279,158.80/418,738.20 = 266,328.40/x
  3. Step 3: Cross multiply
    279,158.80x = 418,738.20 × 266,328.40
  4. Step 4: Simplify right side
    279,158.80x = 111,521,874,824.88
  5. Step 5: Solve for x
    x = 111,521,874,824.88/279,158.80
  6. Step 6: Final answer
    x = 399,492.60

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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.