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Finding the Fourth Proportional to 551,606.40, 761,288.40 and 309,889.44

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Solution

The fourth proportional to 551,606.40, 761,288.40 and 309,889.44 is: 427,687.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    551,606.40 : 761,288.40 = 309,889.44 : x
  2. Step 2: Convert to fraction form
    551,606.40/761,288.40 = 309,889.44/x
  3. Step 3: Cross multiply
    551,606.40x = 761,288.40 × 309,889.44
  4. Step 4: Simplify right side
    551,606.40x = 235,915,235,954.50
  5. Step 5: Solve for x
    x = 235,915,235,954.50/551,606.40
  6. Step 6: Final answer
    x = 427,687.63

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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.