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Finding the Fourth Proportional to 459,587.70, 689,380.52 and 218,971.23

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Solution

The fourth proportional to 459,587.70, 689,380.52 and 218,971.23 is: 328,456.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    459,587.70 : 689,380.52 = 218,971.23 : x
  2. Step 2: Convert to fraction form
    459,587.70/689,380.52 = 218,971.23/x
  3. Step 3: Cross multiply
    459,587.70x = 689,380.52 × 218,971.23
  4. Step 4: Simplify right side
    459,587.70x = 150,954,495,860.68
  5. Step 5: Solve for x
    x = 150,954,495,860.68/459,587.70
  6. Step 6: Final answer
    x = 328,456.35

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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.