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Finding the Fourth Proportional to 285,800.81, 428,728.55 and 108,260.15

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Solution

The fourth proportional to 285,800.81, 428,728.55 and 108,260.15 is: 162,400.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,800.81 : 428,728.55 = 108,260.15 : x
  2. Step 2: Convert to fraction form
    285,800.81/428,728.55 = 108,260.15/x
  3. Step 3: Cross multiply
    285,800.81x = 428,728.55 × 108,260.15
  4. Step 4: Simplify right side
    285,800.81x = 46,414,214,447.34
  5. Step 5: Solve for x
    x = 46,414,214,447.34/285,800.81
  6. Step 6: Final answer
    x = 162,400.57

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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.