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Finding the Fourth Proportional to 658,485.82, 987,706.50 and 279,162.64

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Solution

The fourth proportional to 658,485.82, 987,706.50 and 279,162.64 is: 418,734.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    658,485.82 : 987,706.50 = 279,162.64 : x
  2. Step 2: Convert to fraction form
    658,485.82/987,706.50 = 279,162.64/x
  3. Step 3: Cross multiply
    658,485.82x = 987,706.50 × 279,162.64
  4. Step 4: Simplify right side
    658,485.82x = 275,730,754,085.16
  5. Step 5: Solve for x
    x = 275,730,754,085.16/658,485.82
  6. Step 6: Final answer
    x = 418,734.54

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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.