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Finding the Fourth Proportional to 426,285.90, 638,586.45 and 276,630.30

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Solution

The fourth proportional to 426,285.90, 638,586.45 and 276,630.30 is: 414,398.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,285.90 : 638,586.45 = 276,630.30 : x
  2. Step 2: Convert to fraction form
    426,285.90/638,586.45 = 276,630.30/x
  3. Step 3: Cross multiply
    426,285.90x = 638,586.45 × 276,630.30
  4. Step 4: Simplify right side
    426,285.90x = 176,652,361,239.44
  5. Step 5: Solve for x
    x = 176,652,361,239.44/426,285.90
  6. Step 6: Final answer
    x = 414,398.79

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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.