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Finding the Fourth Proportional to 399,619.80, 551,633.09 and 246,719.80

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Solution

The fourth proportional to 399,619.80, 551,633.09 and 246,719.80 is: 340,570.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,619.80 : 551,633.09 = 246,719.80 : x
  2. Step 2: Convert to fraction form
    399,619.80/551,633.09 = 246,719.80/x
  3. Step 3: Cross multiply
    399,619.80x = 551,633.09 × 246,719.80
  4. Step 4: Simplify right side
    399,619.80x = 136,098,803,542.66
  5. Step 5: Solve for x
    x = 136,098,803,542.66/399,619.80
  6. Step 6: Final answer
    x = 340,570.72

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.