Home / 428,416.20-642,624.30-251,123.40

Finding the Fourth Proportional to 428,416.20, 642,624.30 and 251,123.40

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Solution

The fourth proportional to 428,416.20, 642,624.30 and 251,123.40 is: 376,685.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,416.20 : 642,624.30 = 251,123.40 : x
  2. Step 2: Convert to fraction form
    428,416.20/642,624.30 = 251,123.40/x
  3. Step 3: Cross multiply
    428,416.20x = 642,624.30 × 251,123.40
  4. Step 4: Simplify right side
    428,416.20x = 161,377,999,138.62
  5. Step 5: Solve for x
    x = 161,377,999,138.62/428,416.20
  6. Step 6: Final answer
    x = 376,685.10

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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.