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Finding the Fourth Proportional to 445,690.86, 668,583.15 and 130,148.65

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Solution

The fourth proportional to 445,690.86, 668,583.15 and 130,148.65 is: 195,236.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,690.86 : 668,583.15 = 130,148.65 : x
  2. Step 2: Convert to fraction form
    445,690.86/668,583.15 = 130,148.65/x
  3. Step 3: Cross multiply
    445,690.86x = 668,583.15 × 130,148.65
  4. Step 4: Simplify right side
    445,690.86x = 87,015,194,385.25
  5. Step 5: Solve for x
    x = 87,015,194,385.25/445,690.86
  6. Step 6: Final answer
    x = 195,236.66

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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.