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Finding the Fourth Proportional to 628,474.92, 867,313.64 and 342,013.48

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Solution

The fourth proportional to 628,474.92, 867,313.64 and 342,013.48 is: 471,988.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,474.92 : 867,313.64 = 342,013.48 : x
  2. Step 2: Convert to fraction form
    628,474.92/867,313.64 = 342,013.48/x
  3. Step 3: Cross multiply
    628,474.92x = 867,313.64 × 342,013.48
  4. Step 4: Simplify right side
    628,474.92x = 296,632,956,267.87
  5. Step 5: Solve for x
    x = 296,632,956,267.87/628,474.92
  6. Step 6: Final answer
    x = 471,988.53

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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.