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Finding the Fourth Proportional to 479,531.78, 719,416.05 and 142,570.97

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Solution

The fourth proportional to 479,531.78, 719,416.05 and 142,570.97 is: 213,891.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    479,531.78 : 719,416.05 = 142,570.97 : x
  2. Step 2: Convert to fraction form
    479,531.78/719,416.05 = 142,570.97/x
  3. Step 3: Cross multiply
    479,531.78x = 719,416.05 × 142,570.97
  4. Step 4: Simplify right side
    479,531.78x = 102,567,840,484.99
  5. Step 5: Solve for x
    x = 102,567,840,484.99/479,531.78
  6. Step 6: Final answer
    x = 213,891.65

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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.