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Finding the Fourth Proportional to 426,281.40, 638,579.70 and 276,625.80

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Solution

The fourth proportional to 426,281.40, 638,579.70 and 276,625.80 is: 414,392.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,281.40 : 638,579.70 = 276,625.80 : x
  2. Step 2: Convert to fraction form
    426,281.40/638,579.70 = 276,625.80/x
  3. Step 3: Cross multiply
    426,281.40x = 638,579.70 × 276,625.80
  4. Step 4: Simplify right side
    426,281.40x = 176,647,620,376.26
  5. Step 5: Solve for x
    x = 176,647,620,376.26/426,281.40
  6. Step 6: Final answer
    x = 414,392.04

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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.