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Finding the Fourth Proportional to 551,628.20, 761,200.26 and 309,891.80

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Solution

The fourth proportional to 551,628.20, 761,200.26 and 309,891.80 is: 427,624.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    551,628.20 : 761,200.26 = 309,891.80 : x
  2. Step 2: Convert to fraction form
    551,628.20/761,200.26 = 309,891.80/x
  3. Step 3: Cross multiply
    551,628.20x = 761,200.26 × 309,891.80
  4. Step 4: Simplify right side
    551,628.20x = 235,889,718,731.87
  5. Step 5: Solve for x
    x = 235,889,718,731.87/551,628.20
  6. Step 6: Final answer
    x = 427,624.47

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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.