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Finding the Fourth Proportional to 528,872.40, 792,142.20 and 279,262.80

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Solution

The fourth proportional to 528,872.40, 792,142.20 and 279,262.80 is: 418,278.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,872.40 : 792,142.20 = 279,262.80 : x
  2. Step 2: Convert to fraction form
    528,872.40/792,142.20 = 279,262.80/x
  3. Step 3: Cross multiply
    528,872.40x = 792,142.20 × 279,262.80
  4. Step 4: Simplify right side
    528,872.40x = 221,215,848,770.16
  5. Step 5: Solve for x
    x = 221,215,848,770.16/528,872.40
  6. Step 6: Final answer
    x = 418,278.30

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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.