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Finding the Fourth Proportional to 479,107.80, 718,661.70 and 268,718.40

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Solution

The fourth proportional to 479,107.80, 718,661.70 and 268,718.40 is: 403,077.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    479,107.80 : 718,661.70 = 268,718.40 : x
  2. Step 2: Convert to fraction form
    479,107.80/718,661.70 = 268,718.40/x
  3. Step 3: Cross multiply
    479,107.80x = 718,661.70 × 268,718.40
  4. Step 4: Simplify right side
    479,107.80x = 193,117,622,165.28
  5. Step 5: Solve for x
    x = 193,117,622,165.28/479,107.80
  6. Step 6: Final answer
    x = 403,077.60

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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.