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Finding the Fourth Proportional to 547,898.40, 821,458.80 and 210,808.80

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Solution

The fourth proportional to 547,898.40, 821,458.80 and 210,808.80 is: 316,063.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    547,898.40 : 821,458.80 = 210,808.80 : x
  2. Step 2: Convert to fraction form
    547,898.40/821,458.80 = 210,808.80/x
  3. Step 3: Cross multiply
    547,898.40x = 821,458.80 × 210,808.80
  4. Step 4: Simplify right side
    547,898.40x = 173,170,743,877.44
  5. Step 5: Solve for x
    x = 173,170,743,877.44/547,898.40
  6. Step 6: Final answer
    x = 316,063.61

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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.