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Finding the Fourth Proportional to 426,008, 638,956.48 and 126,482.56

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Solution

The fourth proportional to 426,008, 638,956.48 and 126,482.56 is: 189,707.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,008 : 638,956.48 = 126,482.56 : x
  2. Step 2: Convert to fraction form
    426,008/638,956.48 = 126,482.56/x
  3. Step 3: Cross multiply
    426,008x = 638,956.48 × 126,482.56
  4. Step 4: Simplify right side
    426,008x = 80,816,851,318.99
  5. Step 5: Solve for x
    x = 80,816,851,318.99/426,008
  6. Step 6: Final answer
    x = 189,707.36

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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.