Home / 426,278.40-638,575.20-276,622.80

Finding the Fourth Proportional to 426,278.40, 638,575.20 and 276,622.80

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Solution

The fourth proportional to 426,278.40, 638,575.20 and 276,622.80 is: 414,387.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,278.40 : 638,575.20 = 276,622.80 : x
  2. Step 2: Convert to fraction form
    426,278.40/638,575.20 = 276,622.80/x
  3. Step 3: Cross multiply
    426,278.40x = 638,575.20 × 276,622.80
  4. Step 4: Simplify right side
    426,278.40x = 176,644,459,834.56
  5. Step 5: Solve for x
    x = 176,644,459,834.56/426,278.40
  6. Step 6: Final answer
    x = 414,387.55

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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.