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Finding the Fourth Proportional to 658,214.46, 987,678.90 and 279,348.30

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Solution

The fourth proportional to 658,214.46, 987,678.90 and 279,348.30 is: 419,174.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    658,214.46 : 987,678.90 = 279,348.30 : x
  2. Step 2: Convert to fraction form
    658,214.46/987,678.90 = 279,348.30/x
  3. Step 3: Cross multiply
    658,214.46x = 987,678.90 × 279,348.30
  4. Step 4: Simplify right side
    658,214.46x = 275,906,421,660.87
  5. Step 5: Solve for x
    x = 275,906,421,660.87/658,214.46
  6. Step 6: Final answer
    x = 419,174.05

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1.5x scale

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.