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Finding the Fourth Proportional to 318,455.64, 477,535.86 and 118,722.42

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Solution

The fourth proportional to 318,455.64, 477,535.86 and 118,722.42 is: 178,028.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,455.64 : 477,535.86 = 118,722.42 : x
  2. Step 2: Convert to fraction form
    318,455.64/477,535.86 = 118,722.42/x
  3. Step 3: Cross multiply
    318,455.64x = 477,535.86 × 118,722.42
  4. Step 4: Simplify right side
    318,455.64x = 56,694,212,935.98
  5. Step 5: Solve for x
    x = 56,694,212,935.98/318,455.64
  6. Step 6: Final answer
    x = 178,028.60

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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.