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Finding the Fourth Proportional to 398,986.92, 598,473.90 and 188,775.72

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Solution

The fourth proportional to 398,986.92, 598,473.90 and 188,775.72 is: 283,160.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,986.92 : 598,473.90 = 188,775.72 : x
  2. Step 2: Convert to fraction form
    398,986.92/598,473.90 = 188,775.72/x
  3. Step 3: Cross multiply
    398,986.92x = 598,473.90 × 188,775.72
  4. Step 4: Simplify right side
    398,986.92x = 112,977,341,373.71
  5. Step 5: Solve for x
    x = 112,977,341,373.71/398,986.92
  6. Step 6: Final answer
    x = 283,160.51

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.