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Finding the Fourth Proportional to 630,779.88, 945,819.78 and 209,826.12

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Solution

The fourth proportional to 630,779.88, 945,819.78 and 209,826.12 is: 314,622.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,779.88 : 945,819.78 = 209,826.12 : x
  2. Step 2: Convert to fraction form
    630,779.88/945,819.78 = 209,826.12/x
  3. Step 3: Cross multiply
    630,779.88x = 945,819.78 × 209,826.12
  4. Step 4: Simplify right side
    630,779.88x = 198,457,694,656.65
  5. Step 5: Solve for x
    x = 198,457,694,656.65/630,779.88
  6. Step 6: Final answer
    x = 314,622.74

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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.