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Finding the Fourth Proportional to 658,211.46, 987,674.40 and 279,345.30

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Solution

The fourth proportional to 658,211.46, 987,674.40 and 279,345.30 is: 419,169.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    658,211.46 : 987,674.40 = 279,345.30 : x
  2. Step 2: Convert to fraction form
    658,211.46/987,674.40 = 279,345.30/x
  3. Step 3: Cross multiply
    658,211.46x = 987,674.40 × 279,345.30
  4. Step 4: Simplify right side
    658,211.46x = 275,902,201,570.32
  5. Step 5: Solve for x
    x = 275,902,201,570.32/658,211.46
  6. Step 6: Final answer
    x = 419,169.55

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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.