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Finding the Fourth Proportional to 551,659.68, 761,367.12 and 309,960.96

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Solution

The fourth proportional to 551,659.68, 761,367.12 and 309,960.96 is: 427,789.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    551,659.68 : 761,367.12 = 309,960.96 : x
  2. Step 2: Convert to fraction form
    551,659.68/761,367.12 = 309,960.96/x
  3. Step 3: Cross multiply
    551,659.68x = 761,367.12 × 309,960.96
  4. Step 4: Simplify right side
    551,659.68x = 235,994,083,427.64
  5. Step 5: Solve for x
    x = 235,994,083,427.64/551,659.68
  6. Step 6: Final answer
    x = 427,789.25

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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.