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Finding the Fourth Proportional to 547,909.40, 821,475.30 and 210,819.80

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Solution

The fourth proportional to 547,909.40, 821,475.30 and 210,819.80 is: 316,080.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    547,909.40 : 821,475.30 = 210,819.80 : x
  2. Step 2: Convert to fraction form
    547,909.40/821,475.30 = 210,819.80/x
  3. Step 3: Cross multiply
    547,909.40x = 821,475.30 × 210,819.80
  4. Step 4: Simplify right side
    547,909.40x = 173,183,258,450.94
  5. Step 5: Solve for x
    x = 173,183,258,450.94/547,909.40
  6. Step 6: Final answer
    x = 316,080.10

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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.