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Finding the Fourth Proportional to 551,626.20, 761,197.50 and 309,889.80

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Solution

The fourth proportional to 551,626.20, 761,197.50 and 309,889.80 is: 427,621.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    551,626.20 : 761,197.50 = 309,889.80 : x
  2. Step 2: Convert to fraction form
    551,626.20/761,197.50 = 309,889.80/x
  3. Step 3: Cross multiply
    551,626.20x = 761,197.50 × 309,889.80
  4. Step 4: Simplify right side
    551,626.20x = 235,887,341,035.50
  5. Step 5: Solve for x
    x = 235,887,341,035.50/551,626.20
  6. Step 6: Final answer
    x = 427,621.71

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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.