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Finding the Fourth Proportional to 479,414.84, 718,898.70 and 142,331.72

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Solution

The fourth proportional to 479,414.84, 718,898.70 and 142,331.72 is: 213,431.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    479,414.84 : 718,898.70 = 142,331.72 : x
  2. Step 2: Convert to fraction form
    479,414.84/718,898.70 = 142,331.72/x
  3. Step 3: Cross multiply
    479,414.84x = 718,898.70 × 142,331.72
  4. Step 4: Simplify right side
    479,414.84x = 102,322,088,476.76
  5. Step 5: Solve for x
    x = 102,322,088,476.76/479,414.84
  6. Step 6: Final answer
    x = 213,431.21

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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.