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Finding the Fourth Proportional to 628,562.68, 867,399.86 and 342,076.61

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Solution

The fourth proportional to 628,562.68, 867,399.86 and 342,076.61 is: 472,056.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,562.68 : 867,399.86 = 342,076.61 : x
  2. Step 2: Convert to fraction form
    628,562.68/867,399.86 = 342,076.61/x
  3. Step 3: Cross multiply
    628,562.68x = 867,399.86 × 342,076.61
  4. Step 4: Simplify right side
    628,562.68x = 296,717,206,646.97
  5. Step 5: Solve for x
    x = 296,717,206,646.97/628,562.68
  6. Step 6: Final answer
    x = 472,056.67

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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.