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Finding the Fourth Proportional to 318,795.36, 478,267.92 and 178,650.72

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Solution

The fourth proportional to 318,795.36, 478,267.92 and 178,650.72 is: 268,018.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,795.36 : 478,267.92 = 178,650.72 : x
  2. Step 2: Convert to fraction form
    318,795.36/478,267.92 = 178,650.72/x
  3. Step 3: Cross multiply
    318,795.36x = 478,267.92 × 178,650.72
  4. Step 4: Simplify right side
    318,795.36x = 85,442,908,260.90
  5. Step 5: Solve for x
    x = 85,442,908,260.90/318,795.36
  6. Step 6: Final answer
    x = 268,018.04

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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.