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Finding the Fourth Proportional to 479,620.80, 719,690.40 and 213,422.40

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Solution

The fourth proportional to 479,620.80, 719,690.40 and 213,422.40 is: 320,248.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    479,620.80 : 719,690.40 = 213,422.40 : x
  2. Step 2: Convert to fraction form
    479,620.80/719,690.40 = 213,422.40/x
  3. Step 3: Cross multiply
    479,620.80x = 719,690.40 × 213,422.40
  4. Step 4: Simplify right side
    479,620.80x = 153,598,052,424.96
  5. Step 5: Solve for x
    x = 153,598,052,424.96/479,620.80
  6. Step 6: Final answer
    x = 320,248.94

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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.