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Finding the Fourth Proportional to 421,084.68, 580,931.88 and 259,659.48

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Solution

The fourth proportional to 421,084.68, 580,931.88 and 259,659.48 is: 358,228.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,084.68 : 580,931.88 = 259,659.48 : x
  2. Step 2: Convert to fraction form
    421,084.68/580,931.88 = 259,659.48/x
  3. Step 3: Cross multiply
    421,084.68x = 580,931.88 × 259,659.48
  4. Step 4: Simplify right side
    421,084.68x = 150,844,469,876.22
  5. Step 5: Solve for x
    x = 150,844,469,876.22/421,084.68
  6. Step 6: Final answer
    x = 358,228.35

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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.