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Finding the Fourth Proportional to 459,512.88, 689,269.68 and 143,994.36

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Solution

The fourth proportional to 459,512.88, 689,269.68 and 143,994.36 is: 215,991.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    459,512.88 : 689,269.68 = 143,994.36 : x
  2. Step 2: Convert to fraction form
    459,512.88/689,269.68 = 143,994.36/x
  3. Step 3: Cross multiply
    459,512.88x = 689,269.68 × 143,994.36
  4. Step 4: Simplify right side
    459,512.88x = 99,250,946,439.00
  5. Step 5: Solve for x
    x = 99,250,946,439.00/459,512.88
  6. Step 6: Final answer
    x = 215,991.65

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1.5x scale

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.