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Finding the Fourth Proportional to 459,479.88, 689,219.37 and 143,961.39

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Solution

The fourth proportional to 459,479.88, 689,219.37 and 143,961.39 is: 215,941.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    459,479.88 : 689,219.37 = 143,961.39 : x
  2. Step 2: Convert to fraction form
    459,479.88/689,219.37 = 143,961.39/x
  3. Step 3: Cross multiply
    459,479.88x = 689,219.37 × 143,961.39
  4. Step 4: Simplify right side
    459,479.88x = 99,220,978,520.12
  5. Step 5: Solve for x
    x = 99,220,978,520.12/459,479.88
  6. Step 6: Final answer
    x = 215,941.94

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.