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Finding the Fourth Proportional to 651,959.20, 978,349.20 and 277,976.80

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Solution

The fourth proportional to 651,959.20, 978,349.20 and 277,976.80 is: 417,140.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    651,959.20 : 978,349.20 = 277,976.80 : x
  2. Step 2: Convert to fraction form
    651,959.20/978,349.20 = 277,976.80/x
  3. Step 3: Cross multiply
    651,959.20x = 978,349.20 × 277,976.80
  4. Step 4: Simplify right side
    651,959.20x = 271,958,379,898.56
  5. Step 5: Solve for x
    x = 271,958,379,898.56/651,959.20
  6. Step 6: Final answer
    x = 417,140.18

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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.