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Finding the Fourth Proportional to 426,404.40, 638,764.20 and 276,748.80

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Solution

The fourth proportional to 426,404.40, 638,764.20 and 276,748.80 is: 414,576.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,404.40 : 638,764.20 = 276,748.80 : x
  2. Step 2: Convert to fraction form
    426,404.40/638,764.20 = 276,748.80/x
  3. Step 3: Cross multiply
    426,404.40x = 638,764.20 × 276,748.80
  4. Step 4: Simplify right side
    426,404.40x = 176,777,225,832.96
  5. Step 5: Solve for x
    x = 176,777,225,832.96/426,404.40
  6. Step 6: Final answer
    x = 414,576.46

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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.