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Finding the Fourth Proportional to 318,622.70, 477,932.82 and 118,993.34

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Solution

The fourth proportional to 318,622.70, 477,932.82 and 118,993.34 is: 178,489.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,622.70 : 477,932.82 = 118,993.34 : x
  2. Step 2: Convert to fraction form
    318,622.70/477,932.82 = 118,993.34/x
  3. Step 3: Cross multiply
    318,622.70x = 477,932.82 × 118,993.34
  4. Step 4: Simplify right side
    318,622.70x = 56,870,822,547.42
  5. Step 5: Solve for x
    x = 56,870,822,547.42/318,622.70
  6. Step 6: Final answer
    x = 178,489.55

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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.