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Finding the Fourth Proportional to 318,622.84, 477,934.28 and 131,639.20

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Solution

The fourth proportional to 318,622.84, 477,934.28 and 131,639.20 is: 197,458.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,622.84 : 477,934.28 = 131,639.20 : x
  2. Step 2: Convert to fraction form
    318,622.84/477,934.28 = 131,639.20/x
  3. Step 3: Cross multiply
    318,622.84x = 477,934.28 × 131,639.20
  4. Step 4: Simplify right side
    318,622.84x = 62,914,886,271.78
  5. Step 5: Solve for x
    x = 62,914,886,271.78/318,622.84
  6. Step 6: Final answer
    x = 197,458.81

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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.