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Finding the Fourth Proportional to 309,480.87, 427,159.58 and 188,688.77

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Solution

The fourth proportional to 309,480.87, 427,159.58 and 188,688.77 is: 260,436.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,480.87 : 427,159.58 = 188,688.77 : x
  2. Step 2: Convert to fraction form
    309,480.87/427,159.58 = 188,688.77/x
  3. Step 3: Cross multiply
    309,480.87x = 427,159.58 × 188,688.77
  4. Step 4: Simplify right side
    309,480.87x = 80,600,212,664.67
  5. Step 5: Solve for x
    x = 80,600,212,664.67/309,480.87
  6. Step 6: Final answer
    x = 260,436.82

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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.