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Finding the Fourth Proportional to 628,481.42, 867,322.61 and 342,019.98

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Solution

The fourth proportional to 628,481.42, 867,322.61 and 342,019.98 is: 471,997.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,481.42 : 867,322.61 = 342,019.98 : x
  2. Step 2: Convert to fraction form
    628,481.42/867,322.61 = 342,019.98/x
  3. Step 3: Cross multiply
    628,481.42x = 867,322.61 × 342,019.98
  4. Step 4: Simplify right side
    628,481.42x = 296,641,661,725.75
  5. Step 5: Solve for x
    x = 296,641,661,725.75/628,481.42
  6. Step 6: Final answer
    x = 471,997.50

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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.