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Finding the Fourth Proportional to 459,487.80, 689,231.67 and 143,944.70

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Solution

The fourth proportional to 459,487.80, 689,231.67 and 143,944.70 is: 215,917.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    459,487.80 : 689,231.67 = 143,944.70 : x
  2. Step 2: Convert to fraction form
    459,487.80/689,231.67 = 143,944.70/x
  3. Step 3: Cross multiply
    459,487.80x = 689,231.67 × 143,944.70
  4. Step 4: Simplify right side
    459,487.80x = 99,211,242,522.49
  5. Step 5: Solve for x
    x = 99,211,242,522.49/459,487.80
  6. Step 6: Final answer
    x = 215,917.03

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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.