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Finding the Fourth Proportional to 485,596.38, 670,171.98 and 281,709.66

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Solution

The fourth proportional to 485,596.38, 670,171.98 and 281,709.66 is: 388,787.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,596.38 : 670,171.98 = 281,709.66 : x
  2. Step 2: Convert to fraction form
    485,596.38/670,171.98 = 281,709.66/x
  3. Step 3: Cross multiply
    485,596.38x = 670,171.98 × 281,709.66
  4. Step 4: Simplify right side
    485,596.38x = 188,793,920,627.33
  5. Step 5: Solve for x
    x = 188,793,920,627.33/485,596.38
  6. Step 6: Final answer
    x = 388,787.74

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1.5x scale

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.