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Finding the Fourth Proportional to 471,806.40, 706,672.80 and 419,275.20

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Solution

The fourth proportional to 471,806.40, 706,672.80 and 419,275.20 is: 627,991.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    471,806.40 : 706,672.80 = 419,275.20 : x
  2. Step 2: Convert to fraction form
    471,806.40/706,672.80 = 419,275.20/x
  3. Step 3: Cross multiply
    471,806.40x = 706,672.80 × 419,275.20
  4. Step 4: Simplify right side
    471,806.40x = 296,290,379,554.56
  5. Step 5: Solve for x
    x = 296,290,379,554.56/471,806.40
  6. Step 6: Final answer
    x = 627,991.44

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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.