Home / 287,455.46-431,580.63-198,489.38

Finding the Fourth Proportional to 287,455.46, 431,580.63 and 198,489.38

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Solution

The fourth proportional to 287,455.46, 431,580.63 and 198,489.38 is: 298,008.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,455.46 : 431,580.63 = 198,489.38 : x
  2. Step 2: Convert to fraction form
    287,455.46/431,580.63 = 198,489.38/x
  3. Step 3: Cross multiply
    287,455.46x = 431,580.63 × 198,489.38
  4. Step 4: Simplify right side
    287,455.46x = 85,664,171,668.71
  5. Step 5: Solve for x
    x = 85,664,171,668.71/287,455.46
  6. Step 6: Final answer
    x = 298,008.50

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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.