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Finding the Fourth Proportional to 479,612.80, 719,678.40 and 213,414.40

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Solution

The fourth proportional to 479,612.80, 719,678.40 and 213,414.40 is: 320,236.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    479,612.80 : 719,678.40 = 213,414.40 : x
  2. Step 2: Convert to fraction form
    479,612.80/719,678.40 = 213,414.40/x
  3. Step 3: Cross multiply
    479,612.80x = 719,678.40 × 213,414.40
  4. Step 4: Simplify right side
    479,612.80x = 153,589,733,928.96
  5. Step 5: Solve for x
    x = 153,589,733,928.96/479,612.80
  6. Step 6: Final answer
    x = 320,236.94

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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.